drivers/net/wireless/iwlwifi/mvm/mac80211.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
  24  *
  25  * The full GNU General Public License is included in this distribution
  26  * in the file called COPYING.
  27  *
  28  * Contact Information:
  29  *  Intel Linux Wireless <ilw@linux.intel.com>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  *
  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  *  * Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
  48  *  * Neither the name Intel Corporation nor the names of its
  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65 #include <linux/kernel.h>
  66 #include <linux/slab.h>
  67 #include <linux/skbuff.h>
  68 #include <linux/netdevice.h>
  69 #include <linux/etherdevice.h>
  70 #include <linux/ip.h>
  71 #include <linux/if_arp.h>
  72 #include <linux/devcoredump.h>
  73 #include <net/mac80211.h>
  74 #include <net/ieee80211_radiotap.h>
  75 #include <net/tcp.h>
  76
  77 #include "iwl-op-mode.h"
  78 #include "iwl-io.h"
  79 #include "mvm.h"
  80 #include "sta.h"
  81 #include "time-event.h"
  82 #include "iwl-eeprom-parse.h"
  83 #include "iwl-phy-db.h"
  84 #include "testmode.h"
  85 #include "iwl-fw-error-dump.h"
  86 #include "iwl-prph.h"
  87 #include "iwl-csr.h"
  88 #include "iwl-nvm-parse.h"
  89
  90 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
  91         {
  92                 .max = 1,
  93                 .types = BIT(NL80211_IFTYPE_STATION),
  94         },
  95         {
  96                 .max = 1,
  97                 .types = BIT(NL80211_IFTYPE_AP) |
  98                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
  99                         BIT(NL80211_IFTYPE_P2P_GO),
 100         },
 101         {
 102                 .max = 1,
 103                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 104         },
 105 };
 106
 107 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
 108         {
 109                 .num_different_channels = 2,
 110                 .max_interfaces = 3,
 111                 .limits = iwl_mvm_limits,
 112                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
 113         },
 114 };
 115
 116 #ifdef CONFIG_PM_SLEEP
 117 static const struct nl80211_wowlan_tcp_data_token_feature
 118 iwl_mvm_wowlan_tcp_token_feature = {
 119         .min_len = 0,
 120         .max_len = 255,
 121         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
 122 };
 123
 124 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
 125         .tok = &iwl_mvm_wowlan_tcp_token_feature,
 126         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
 127                             sizeof(struct ethhdr) -
 128                             sizeof(struct iphdr) -
 129                             sizeof(struct tcphdr),
 130         .data_interval_max = 65535, /* __le16 in API */
 131         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
 132                             sizeof(struct ethhdr) -
 133                             sizeof(struct iphdr) -
 134                             sizeof(struct tcphdr),
 135         .seq = true,
 136 };
 137 #endif
 138
 139 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 140 /*
 141  * Use the reserved field to indicate magic values.
 142  * these values will only be used internally by the driver,
 143  * and won't make it to the fw (reserved will be 0).
 144  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 145  *      be the vif's ip address. in case there is not a single
 146  *      ip address (0, or more than 1), this attribute will
 147  *      be skipped.
 148  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 149  *      the LSB bytes of the vif's mac address
 150  */
 151 enum {
 152         BC_FILTER_MAGIC_NONE = 0,
 153         BC_FILTER_MAGIC_IP,
 154         BC_FILTER_MAGIC_MAC,
 155 };
 156
 157 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
 158         {
 159                 /* arp */
 160                 .discard = 0,
 161                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
 162                 .attrs = {
 163                         {
 164                                 /* frame type - arp, hw type - ethernet */
 165                                 .offset_type =
 166                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 167                                 .offset = sizeof(rfc1042_header),
 168                                 .val = cpu_to_be32(0x08060001),
 169                                 .mask = cpu_to_be32(0xffffffff),
 170                         },
 171                         {
 172                                 /* arp dest ip */
 173                                 .offset_type =
 174                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
 175                                 .offset = sizeof(rfc1042_header) + 2 +
 176                                           sizeof(struct arphdr) +
 177                                           ETH_ALEN + sizeof(__be32) +
 178                                           ETH_ALEN,
 179                                 .mask = cpu_to_be32(0xffffffff),
 180                                 /* mark it as special field */
 181                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
 182                         },
 183                 },
 184         },
 185         {
 186                 /* dhcp offer bcast */
 187                 .discard = 0,
 188                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
 189                 .attrs = {
 190                         {
 191                                 /* udp dest port - 68 (bootp client)*/
 192                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 193                                 .offset = offsetof(struct udphdr, dest),
 194                                 .val = cpu_to_be32(0x00440000),
 195                                 .mask = cpu_to_be32(0xffff0000),
 196                         },
 197                         {
 198                                 /* dhcp - lsb bytes of client hw address */
 199                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
 200                                 .offset = 38,
 201                                 .mask = cpu_to_be32(0xffffffff),
 202                                 /* mark it as special field */
 203                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
 204                         },
 205                 },
 206         },
 207         /* last filter must be empty */
 208         {},
 209 };
 210 #endif
 211
 212 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 213 {
 214         if (!iwl_mvm_is_d0i3_supported(mvm))
 215                 return;
 216
 217         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
 218         spin_lock_bh(&mvm->refs_lock);
 219         mvm->refs[ref_type]++;
 220         spin_unlock_bh(&mvm->refs_lock);
 221         iwl_trans_ref(mvm->trans);
 222 }
 223
 224 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 225 {
 226         if (!iwl_mvm_is_d0i3_supported(mvm))
 227                 return;
 228
 229         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
 230         spin_lock_bh(&mvm->refs_lock);
 231         WARN_ON(!mvm->refs[ref_type]--);
 232         spin_unlock_bh(&mvm->refs_lock);
 233         iwl_trans_unref(mvm->trans);
 234 }
 235
 236 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
 237                                      enum iwl_mvm_ref_type except_ref)
 238 {
 239         int i, j;
 240
 241         if (!iwl_mvm_is_d0i3_supported(mvm))
 242                 return;
 243
 244         spin_lock_bh(&mvm->refs_lock);
 245         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 246                 if (except_ref == i || !mvm->refs[i])
 247                         continue;
 248
 249                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
 250                               i, mvm->refs[i]);
 251                 for (j = 0; j < mvm->refs[i]; j++)
 252                         iwl_trans_unref(mvm->trans);
 253                 mvm->refs[i] = 0;
 254         }
 255         spin_unlock_bh(&mvm->refs_lock);
 256 }
 257
 258 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
 259 {
 260         int i;
 261         bool taken = false;
 262
 263         if (!iwl_mvm_is_d0i3_supported(mvm))
 264                 return true;
 265
 266         spin_lock_bh(&mvm->refs_lock);
 267         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
 268                 if (mvm->refs[i]) {
 269                         taken = true;
 270                         break;
 271                 }
 272         }
 273         spin_unlock_bh(&mvm->refs_lock);
 274
 275         return taken;
 276 }
 277
 278 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
 279 {
 280         iwl_mvm_ref(mvm, ref_type);
 281
 282         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
 283                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
 284                                 HZ)) {
 285                 WARN_ON_ONCE(1);
 286                 iwl_mvm_unref(mvm, ref_type);
 287                 return -EIO;
 288         }
 289
 290         return 0;
 291 }
 292
 293 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
 294 {
 295         int i;
 296
 297         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
 298         for (i = 0; i < NUM_PHY_CTX; i++) {
 299                 mvm->phy_ctxts[i].id = i;
 300                 mvm->phy_ctxts[i].ref = 0;
 301         }
 302 }
 303
 304 struct ieee80211_regdomain *iwl_mvm_get_regdomain(struct wiphy *wiphy,
 305                                                   const char *alpha2,
 306                                                   enum iwl_mcc_source src_id,
 307                                                   bool *changed)
 308 {
 309         struct ieee80211_regdomain *regd = NULL;
 310         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
 311         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 312         struct iwl_mcc_update_resp *resp;
 313
 314         IWL_DEBUG_LAR(mvm, "Getting regdomain data for %s from FW\n", alpha2);
 315
 316         lockdep_assert_held(&mvm->mutex);
 317
 318         resp = iwl_mvm_update_mcc(mvm, alpha2, src_id);
 319         if (IS_ERR_OR_NULL(resp)) {
 320                 IWL_DEBUG_LAR(mvm, "Could not get update from FW %d\n",
 321                               PTR_RET(resp));
 322                 goto out;
 323         }
 324
 325         if (changed)
 326                 *changed = (resp->status == MCC_RESP_NEW_CHAN_PROFILE);
 327
 328         regd = iwl_parse_nvm_mcc_info(mvm->trans->dev, mvm->cfg,
 329                                       __le32_to_cpu(resp->n_channels),
 330                                       resp->channels,
 331                                       __le16_to_cpu(resp->mcc));
 332         /* Store the return source id */
 333         src_id = resp->source_id;
 334         kfree(resp);
 335         if (IS_ERR_OR_NULL(regd)) {
 336                 IWL_DEBUG_LAR(mvm, "Could not get parse update from FW %d\n",
 337                               PTR_RET(regd));
 338                 goto out;
 339         }
 340
 341         IWL_DEBUG_LAR(mvm, "setting alpha2 from FW to %s (0x%x, 0x%x) src=%d\n",
 342                       regd->alpha2, regd->alpha2[0], regd->alpha2[1], src_id);
 343         mvm->lar_regdom_set = true;
 344         mvm->mcc_src = src_id;
 345
 346 out:
 347         return regd;
 348 }
 349
 350 void iwl_mvm_update_changed_regdom(struct iwl_mvm *mvm)
 351 {
 352         bool changed;
 353         struct ieee80211_regdomain *regd;
 354
 355         if (!iwl_mvm_is_lar_supported(mvm))
 356                 return;
 357
 358         regd = iwl_mvm_get_current_regdomain(mvm, &changed);
 359         if (!IS_ERR_OR_NULL(regd)) {
 360                 /* only update the regulatory core if changed */
 361                 if (changed)
 362                         regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
 363
 364                 kfree(regd);
 365         }
 366 }
 367
 368 struct ieee80211_regdomain *iwl_mvm_get_current_regdomain(struct iwl_mvm *mvm,
 369                                                           bool *changed)
 370 {
 371         return iwl_mvm_get_regdomain(mvm->hw->wiphy, "ZZ",
 372                                      iwl_mvm_is_wifi_mcc_supported(mvm) ?
 373                                      MCC_SOURCE_GET_CURRENT :
 374                                      MCC_SOURCE_OLD_FW, changed);
 375 }
 376
 377 int iwl_mvm_init_fw_regd(struct iwl_mvm *mvm)
 378 {
 379         enum iwl_mcc_source used_src;
 380         struct ieee80211_regdomain *regd;
 381         int ret;
 382         bool changed;
 383         const struct ieee80211_regdomain *r =
 384                         rtnl_dereference(mvm->hw->wiphy->regd);
 385
 386         if (!r)
 387                 return -ENOENT;
 388
 389         /* save the last source in case we overwrite it below */
 390         used_src = mvm->mcc_src;
 391         if (iwl_mvm_is_wifi_mcc_supported(mvm)) {
 392                 /* Notify the firmware we support wifi location updates */
 393                 regd = iwl_mvm_get_current_regdomain(mvm, NULL);
 394                 if (!IS_ERR_OR_NULL(regd))
 395                         kfree(regd);
 396         }
 397
 398         /* Now set our last stored MCC and source */
 399         regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, r->alpha2, used_src,
 400                                      &changed);
 401         if (IS_ERR_OR_NULL(regd))
 402                 return -EIO;
 403
 404         /* update cfg80211 if the regdomain was changed */
 405         if (changed)
 406                 ret = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd);
 407         else
 408                 ret = 0;
 409
 410         kfree(regd);
 411         return ret;
 412 }
 413
 414 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 415 {
 416         struct ieee80211_hw *hw = mvm->hw;
 417         int num_mac, ret, i;
 418
 419         /* Tell mac80211 our characteristics */
 420         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 421                     IEEE80211_HW_SPECTRUM_MGMT |
 422                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 423                     IEEE80211_HW_QUEUE_CONTROL |
 424                     IEEE80211_HW_WANT_MONITOR_VIF |
 425                     IEEE80211_HW_SUPPORTS_PS |
 426                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 427                     IEEE80211_HW_AMPDU_AGGREGATION |
 428                     IEEE80211_HW_TIMING_BEACON_ONLY |
 429                     IEEE80211_HW_CONNECTION_MONITOR |
 430                     IEEE80211_HW_CHANCTX_STA_CSA |
 431                     IEEE80211_HW_SUPPORTS_CLONED_SKBS;
 432
 433         hw->queues = mvm->first_agg_queue;
 434         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
 435         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
 436                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
 437         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
 438                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
 439         hw->rate_control_algorithm = "iwl-mvm-rs";
 440         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
 441         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
 442
 443         /*
 444          * Enable 11w if advertised by firmware and software crypto
 445          * is not enabled (as the firmware will interpret some mgmt
 446          * packets, so enabling it with software crypto isn't safe)
 447          */
 448         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 449             !iwlwifi_mod_params.sw_crypto)
 450                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 451
 452         hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
 453         hw->wiphy->features |=
 454                 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
 455                 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
 456
 457         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
 458         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
 459         hw->chanctx_data_size = sizeof(u16);
 460
 461         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 462                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
 463                 BIT(NL80211_IFTYPE_AP) |
 464                 BIT(NL80211_IFTYPE_P2P_GO) |
 465                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
 466                 BIT(NL80211_IFTYPE_ADHOC);
 467
 468         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 469         hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
 470         if (iwl_mvm_is_lar_supported(mvm))
 471                 hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
 472         else
 473                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 474                                                REGULATORY_DISABLE_BEACON_HINTS;
 475
 476         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
 477                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
 478
 479         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
 480
 481         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
 482         hw->wiphy->n_iface_combinations =
 483                 ARRAY_SIZE(iwl_mvm_iface_combinations);
 484
 485         hw->wiphy->max_remain_on_channel_duration = 10000;
 486         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 487         /* we can compensate an offset of up to 3 channels = 15 MHz */
 488         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
 489
 490         /* Extract MAC address */
 491         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
 492         hw->wiphy->addresses = mvm->addresses;
 493         hw->wiphy->n_addresses = 1;
 494
 495         /* Extract additional MAC addresses if available */
 496         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
 497                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
 498
 499         for (i = 1; i < num_mac; i++) {
 500                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
 501                        ETH_ALEN);
 502                 mvm->addresses[i].addr[5]++;
 503                 hw->wiphy->n_addresses++;
 504         }
 505
 506         iwl_mvm_reset_phy_ctxts(mvm);
 507
 508         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
 509
 510         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 511
 512         BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
 513                      IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));
 514
 515         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
 516                 mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
 517         else
 518                 mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;
 519
 520         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 521                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 522                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 523         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels) {
 524                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 525                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 526
 527                 if ((mvm->fw->ucode_capa.capa[0] &
 528                      IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
 529                     (mvm->fw->ucode_capa.api[0] &
 530                      IWL_UCODE_TLV_API_LQ_SS_PARAMS))
 531                         hw->wiphy->bands[IEEE80211_BAND_5GHZ]->vht_cap.cap |=
 532                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
 533         }
 534
 535         hw->wiphy->hw_version = mvm->trans->hw_id;
 536
 537         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 538                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 539         else
 540                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 541
 542         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
 543                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
 544                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
 545                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
 546                 /* we create the 802.11 header and zero length SSID IE. */
 547                 hw->wiphy->max_sched_scan_ie_len =
 548                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
 549         }
 550
 551         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
 552                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
 553                                NL80211_FEATURE_P2P_GO_OPPPS |
 554                                NL80211_FEATURE_DYNAMIC_SMPS |
 555                                NL80211_FEATURE_STATIC_SMPS |
 556                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
 557
 558         if (mvm->fw->ucode_capa.capa[0] &
 559             IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
 560                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
 561         if (mvm->fw->ucode_capa.capa[0] &
 562             IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
 563                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
 564
 565         if (mvm->fw->ucode_capa.capa[0] &
 566             IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
 567                 hw->wiphy->features |=
 568                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
 569
 570         if (mvm->fw->ucode_capa.capa[0] &
 571             IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
 572                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
 573
 574         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 575
 576         /* currently FW API supports only one optional cipher scheme */
 577         if (mvm->fw->cs[0].cipher) {
 578                 mvm->hw->n_cipher_schemes = 1;
 579                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 580         }
 581
 582 #ifdef CONFIG_PM_SLEEP
 583         if (iwl_mvm_is_d0i3_supported(mvm) &&
 584             device_can_wakeup(mvm->trans->dev)) {
 585                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
 586                 hw->wiphy->wowlan = &mvm->wowlan;
 587         }
 588
 589         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 590             mvm->trans->ops->d3_suspend &&
 591             mvm->trans->ops->d3_resume &&
 592             device_can_wakeup(mvm->trans->dev)) {
 593                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
 594                                      WIPHY_WOWLAN_DISCONNECT |
 595                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 596                                      WIPHY_WOWLAN_RFKILL_RELEASE |
 597                                      WIPHY_WOWLAN_NET_DETECT;
 598                 if (!iwlwifi_mod_params.sw_crypto)
 599                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 600                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
 601                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
 602
 603                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
 604                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
 605                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
 606                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
 607                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
 608                 hw->wiphy->wowlan = &mvm->wowlan;
 609         }
 610 #endif
 611
 612 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
 613         /* assign default bcast filtering configuration */
 614         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
 615 #endif
 616
 617         ret = iwl_mvm_leds_init(mvm);
 618         if (ret)
 619                 return ret;
 620
 621         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_TDLS_SUPPORT) {
 622                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
 623                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
 624         }
 625
 626         if (mvm->fw->ucode_capa.capa[0] &
 627             IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH) {
 628                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
 629                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 630         }
 631
 632         ret = ieee80211_register_hw(mvm->hw);
 633         if (ret)
 634                 iwl_mvm_leds_exit(mvm);
 635
 636         return ret;
 637 }
 638
 639 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
 640                              struct ieee80211_sta *sta,
 641                              struct sk_buff *skb)
 642 {
 643         struct iwl_mvm_sta *mvmsta;
 644         bool defer = false;
 645
 646         /*
 647          * double check the IN_D0I3 flag both before and after
 648          * taking the spinlock, in order to prevent taking
 649          * the spinlock when not needed.
 650          */
 651         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
 652                 return false;
 653
 654         spin_lock(&mvm->d0i3_tx_lock);
 655         /*
 656          * testing the flag again ensures the skb dequeue
 657          * loop (on d0i3 exit) hasn't run yet.
 658          */
 659         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
 660                 goto out;
 661
 662         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 663         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
 664             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
 665                 goto out;
 666
 667         __skb_queue_tail(&mvm->d0i3_tx, skb);
 668         ieee80211_stop_queues(mvm->hw);
 669
 670         /* trigger wakeup */
 671         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
 672         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
 673
 674         defer = true;
 675 out:
 676         spin_unlock(&mvm->d0i3_tx_lock);
 677         return defer;
 678 }
 679
 680 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
 681                            struct ieee80211_tx_control *control,
 682                            struct sk_buff *skb)
 683 {
 684         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 685         struct ieee80211_sta *sta = control->sta;
 686         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 687         struct ieee80211_hdr *hdr = (void *)skb->data;
 688
 689         if (iwl_mvm_is_radio_killed(mvm)) {
 690                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
 691                 goto drop;
 692         }
 693
 694         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
 695             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
 696             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
 697                 goto drop;
 698
 699         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
 700         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
 701                      ieee80211_is_mgmt(hdr->frame_control) &&
 702                      !ieee80211_is_deauth(hdr->frame_control) &&
 703                      !ieee80211_is_disassoc(hdr->frame_control) &&
 704                      !ieee80211_is_action(hdr->frame_control)))
 705                 sta = NULL;
 706
 707         if (sta) {
 708                 if (iwl_mvm_defer_tx(mvm, sta, skb))
 709                         return;
 710                 if (iwl_mvm_tx_skb(mvm, skb, sta))
 711                         goto drop;
 712                 return;
 713         }
 714
 715         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
 716                 goto drop;
 717         return;
 718  drop:
 719         ieee80211_free_txskb(hw, skb);
 720 }
 721
 722 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 723 {
 724         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 725                 return false;
 726         return true;
 727 }
 728
 729 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 730 {
 731         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 732                 return false;
 733         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 734                 return true;
 735
 736         /* enabled by default */
 737         return true;
 738 }
 739
 740 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
 741                                     struct ieee80211_vif *vif,
 742                                     enum ieee80211_ampdu_mlme_action action,
 743                                     struct ieee80211_sta *sta, u16 tid,
 744                                     u16 *ssn, u8 buf_size)
 745 {
 746         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 747         int ret;
 748         bool tx_agg_ref = false;
 749
 750         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
 751                      sta->addr, tid, action);
 752
 753         if (!(mvm->nvm_data->sku_cap_11n_enable))
 754                 return -EACCES;
 755
 756         /* return from D0i3 before starting a new Tx aggregation */
 757         switch (action) {
 758         case IEEE80211_AMPDU_TX_START:
 759         case IEEE80211_AMPDU_TX_STOP_CONT:
 760         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 761         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 762         case IEEE80211_AMPDU_TX_OPERATIONAL:
 763                 /*
 764                  * for tx start, wait synchronously until D0i3 exit to
 765                  * get the correct sequence number for the tid.
 766                  * additionally, some other ampdu actions use direct
 767                  * target access, which is not handled automatically
 768                  * by the trans layer (unlike commands), so wait for
 769                  * d0i3 exit in these cases as well.
 770                  */
 771                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
 772                 if (ret)
 773                         return ret;
 774
 775                 tx_agg_ref = true;
 776                 break;
 777         default:
 778                 break;
 779         }
 780
 781         mutex_lock(&mvm->mutex);
 782
 783         switch (action) {
 784         case IEEE80211_AMPDU_RX_START:
 785                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
 786                         ret = -EINVAL;
 787                         break;
 788                 }
 789                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
 790                 break;
 791         case IEEE80211_AMPDU_RX_STOP:
 792                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
 793                 break;
 794         case IEEE80211_AMPDU_TX_START:
 795                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
 796                         ret = -EINVAL;
 797                         break;
 798                 }
 799                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
 800                 break;
 801         case IEEE80211_AMPDU_TX_STOP_CONT:
 802                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
 803                 break;
 804         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 805         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 806                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
 807                 break;
 808         case IEEE80211_AMPDU_TX_OPERATIONAL:
 809                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
 810                 break;
 811         default:
 812                 WARN_ON_ONCE(1);
 813                 ret = -EINVAL;
 814                 break;
 815         }
 816         mutex_unlock(&mvm->mutex);
 817
 818         /*
 819          * If the tid is marked as started, we won't use it for offloaded
 820          * traffic on the next D0i3 entry. It's safe to unref.
 821          */
 822         if (tx_agg_ref)
 823                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
 824
 825         return ret;
 826 }
 827
 828 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
 829                                      struct ieee80211_vif *vif)
 830 {
 831         struct iwl_mvm *mvm = data;
 832         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 833
 834         mvmvif->uploaded = false;
 835         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
 836
 837         spin_lock_bh(&mvm->time_event_lock);
 838         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
 839         spin_unlock_bh(&mvm->time_event_lock);
 840
 841         mvmvif->phy_ctxt = NULL;
 842         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
 843 }
 844
 845 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
 846                                      const void *data, size_t datalen)
 847 {
 848         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
 849         ssize_t bytes_read;
 850         ssize_t bytes_read_trans;
 851
 852         if (offset < dump_ptrs->op_mode_len) {
 853                 bytes_read = min_t(ssize_t, count,
 854                                    dump_ptrs->op_mode_len - offset);
 855                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
 856                        bytes_read);
 857                 offset += bytes_read;
 858                 count -= bytes_read;
 859
 860                 if (count == 0)
 861                         return bytes_read;
 862         } else {
 863                 bytes_read = 0;
 864         }
 865
 866         if (!dump_ptrs->trans_ptr)
 867                 return bytes_read;
 868
 869         offset -= dump_ptrs->op_mode_len;
 870         bytes_read_trans = min_t(ssize_t, count,
 871                                  dump_ptrs->trans_ptr->len - offset);
 872         memcpy(buffer + bytes_read,
 873                (u8 *)dump_ptrs->trans_ptr->data + offset,
 874                bytes_read_trans);
 875
 876         return bytes_read + bytes_read_trans;
 877 }
 878
 879 static void iwl_mvm_free_coredump(const void *data)
 880 {
 881         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
 882
 883         vfree(fw_error_dump->op_mode_ptr);
 884         vfree(fw_error_dump->trans_ptr);
 885         kfree(fw_error_dump);
 886 }
 887
 888 static void iwl_mvm_dump_fifos(struct iwl_mvm *mvm,
 889                                struct iwl_fw_error_dump_data **dump_data)
 890 {
 891         struct iwl_fw_error_dump_fifo *fifo_hdr;
 892         u32 *fifo_data;
 893         u32 fifo_len;
 894         unsigned long flags;
 895         int i, j;
 896
 897         if (!iwl_trans_grab_nic_access(mvm->trans, false, &flags))
 898                 return;
 899
 900         /* Pull RXF data from all RXFs */
 901         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.rxfifo_size); i++) {
 902                 /*
 903                  * Keep aside the additional offset that might be needed for
 904                  * next RXF
 905                  */
 906                 u32 offset_diff = RXF_DIFF_FROM_PREV * i;
 907
 908                 fifo_hdr = (void *)(*dump_data)->data;
 909                 fifo_data = (void *)fifo_hdr->data;
 910                 fifo_len = mvm->shared_mem_cfg.rxfifo_size[i];
 911
 912                 /* No need to try to read the data if the length is 0 */
 913                 if (fifo_len == 0)
 914                         continue;
 915
 916                 /* Add a TLV for the RXF */
 917                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
 918                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
 919
 920                 fifo_hdr->fifo_num = cpu_to_le32(i);
 921                 fifo_hdr->available_bytes =
 922                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 923                                                         RXF_RD_D_SPACE +
 924                                                         offset_diff));
 925                 fifo_hdr->wr_ptr =
 926                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 927                                                         RXF_RD_WR_PTR +
 928                                                         offset_diff));
 929                 fifo_hdr->rd_ptr =
 930                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 931                                                         RXF_RD_RD_PTR +
 932                                                         offset_diff));
 933                 fifo_hdr->fence_ptr =
 934                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 935                                                         RXF_RD_FENCE_PTR +
 936                                                         offset_diff));
 937                 fifo_hdr->fence_mode =
 938                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 939                                                         RXF_SET_FENCE_MODE +
 940                                                         offset_diff));
 941
 942                 /* Lock fence */
 943                 iwl_trans_write_prph(mvm->trans,
 944                                      RXF_SET_FENCE_MODE + offset_diff, 0x1);
 945                 /* Set fence pointer to the same place like WR pointer */
 946                 iwl_trans_write_prph(mvm->trans,
 947                                      RXF_LD_WR2FENCE + offset_diff, 0x1);
 948                 /* Set fence offset */
 949                 iwl_trans_write_prph(mvm->trans,
 950                                      RXF_LD_FENCE_OFFSET_ADDR + offset_diff,
 951                                      0x0);
 952
 953                 /* Read FIFO */
 954                 fifo_len /= sizeof(u32); /* Size in DWORDS */
 955                 for (j = 0; j < fifo_len; j++)
 956                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
 957                                                          RXF_FIFO_RD_FENCE_INC +
 958                                                          offset_diff);
 959                 *dump_data = iwl_fw_error_next_data(*dump_data);
 960         }
 961
 962         /* Pull TXF data from all TXFs */
 963         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.txfifo_size); i++) {
 964                 /* Mark the number of TXF we're pulling now */
 965                 iwl_trans_write_prph(mvm->trans, TXF_LARC_NUM, i);
 966
 967                 fifo_hdr = (void *)(*dump_data)->data;
 968                 fifo_data = (void *)fifo_hdr->data;
 969                 fifo_len = mvm->shared_mem_cfg.txfifo_size[i];
 970
 971                 /* No need to try to read the data if the length is 0 */
 972                 if (fifo_len == 0)
 973                         continue;
 974
 975                 /* Add a TLV for the FIFO */
 976                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXF);
 977                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
 978
 979                 fifo_hdr->fifo_num = cpu_to_le32(i);
 980                 fifo_hdr->available_bytes =
 981                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 982                                                         TXF_FIFO_ITEM_CNT));
 983                 fifo_hdr->wr_ptr =
 984                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 985                                                         TXF_WR_PTR));
 986                 fifo_hdr->rd_ptr =
 987                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 988                                                         TXF_RD_PTR));
 989                 fifo_hdr->fence_ptr =
 990                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 991                                                         TXF_FENCE_PTR));
 992                 fifo_hdr->fence_mode =
 993                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
 994                                                         TXF_LOCK_FENCE));
 995
 996                 /* Set the TXF_READ_MODIFY_ADDR to TXF_WR_PTR */
 997                 iwl_trans_write_prph(mvm->trans, TXF_READ_MODIFY_ADDR,
 998                                      TXF_WR_PTR);
 999
1000                 /* Dummy-read to advance the read pointer to the head */
1001                 iwl_trans_read_prph(mvm->trans, TXF_READ_MODIFY_DATA);
1002
1003                 /* Read FIFO */
1004                 fifo_len /= sizeof(u32); /* Size in DWORDS */
1005                 for (j = 0; j < fifo_len; j++)
1006                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
1007                                                           TXF_READ_MODIFY_DATA);
1008                 *dump_data = iwl_fw_error_next_data(*dump_data);
1009         }
1010
1011         iwl_trans_release_nic_access(mvm->trans, &flags);
1012 }
1013
1014 void iwl_mvm_free_fw_dump_desc(struct iwl_mvm *mvm)
1015 {
1016         if (mvm->fw_dump_desc == &iwl_mvm_dump_desc_assert ||
1017             !mvm->fw_dump_desc)
1018                 return;
1019
1020         kfree(mvm->fw_dump_desc);
1021         mvm->fw_dump_desc = NULL;
1022 }
1023
1024 #define IWL8260_ICCM_OFFSET             0x44000 /* Only for B-step */
1025 #define IWL8260_ICCM_LEN                0xC000 /* Only for B-step */
1026
1027 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
1028 {
1029         struct iwl_fw_error_dump_file *dump_file;
1030         struct iwl_fw_error_dump_data *dump_data;
1031         struct iwl_fw_error_dump_info *dump_info;
1032         struct iwl_fw_error_dump_mem *dump_mem;
1033         struct iwl_fw_error_dump_trigger_desc *dump_trig;
1034         struct iwl_mvm_dump_ptrs *fw_error_dump;
1035         u32 sram_len, sram_ofs;
1036         u32 file_len, fifo_data_len = 0;
1037         u32 smem_len = mvm->cfg->smem_len;
1038         u32 sram2_len = mvm->cfg->dccm2_len;
1039
1040         lockdep_assert_held(&mvm->mutex);
1041
1042         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
1043         if (!fw_error_dump)
1044                 return;
1045
1046         /* SRAM - include stack CCM if driver knows the values for it */
1047         if (!mvm->cfg->dccm_offset || !mvm->cfg->dccm_len) {
1048                 const struct fw_img *img;
1049
1050                 img = &mvm->fw->img[mvm->cur_ucode];
1051                 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1052                 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
1053         } else {
1054                 sram_ofs = mvm->cfg->dccm_offset;
1055                 sram_len = mvm->cfg->dccm_len;
1056         }
1057
1058         /* reading RXF/TXF sizes */
1059         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status)) {
1060                 struct iwl_mvm_shared_mem_cfg *mem_cfg = &mvm->shared_mem_cfg;
1061                 int i;
1062
1063                 fifo_data_len = 0;
1064
1065                 /* Count RXF size */
1066                 for (i = 0; i < ARRAY_SIZE(mem_cfg->rxfifo_size); i++) {
1067                         if (!mem_cfg->rxfifo_size[i])
1068                                 continue;
1069
1070                         /* Add header info */
1071                         fifo_data_len += mem_cfg->rxfifo_size[i] +
1072                                          sizeof(*dump_data) +
1073                                          sizeof(struct iwl_fw_error_dump_fifo);
1074                 }
1075
1076                 for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++) {
1077                         if (!mem_cfg->txfifo_size[i])
1078                                 continue;
1079
1080                         /* Add header info */
1081                         fifo_data_len += mem_cfg->txfifo_size[i] +
1082                                          sizeof(*dump_data) +
1083                                          sizeof(struct iwl_fw_error_dump_fifo);
1084                 }
1085         }
1086
1087         file_len = sizeof(*dump_file) +
1088                    sizeof(*dump_data) * 2 +
1089                    sram_len + sizeof(*dump_mem) +
1090                    fifo_data_len +
1091                    sizeof(*dump_info);
1092
1093         /*
1094          * In 8000 HW family B-step include the ICCM (which resides separately)
1095          */
1096         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1097             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP)
1098                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) +
1099                             IWL8260_ICCM_LEN;
1100
1101         if (mvm->fw_dump_desc)
1102                 file_len += sizeof(*dump_data) + sizeof(*dump_trig) +
1103                             mvm->fw_dump_desc->len;
1104
1105         /* Make room for the SMEM, if it exists */
1106         if (smem_len)
1107                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + smem_len;
1108
1109         /* Make room for the secondary SRAM, if it exists */
1110         if (sram2_len)
1111                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + sram2_len;
1112
1113         dump_file = vzalloc(file_len);
1114         if (!dump_file) {
1115                 kfree(fw_error_dump);
1116                 iwl_mvm_free_fw_dump_desc(mvm);
1117                 return;
1118         }
1119
1120         fw_error_dump->op_mode_ptr = dump_file;
1121
1122         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
1123         dump_data = (void *)dump_file->data;
1124
1125         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
1126         dump_data->len = cpu_to_le32(sizeof(*dump_info));
1127         dump_info = (void *) dump_data->data;
1128         dump_info->device_family =
1129                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
1130                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
1131                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
1132         dump_info->hw_step = cpu_to_le32(CSR_HW_REV_STEP(mvm->trans->hw_rev));
1133         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
1134                sizeof(dump_info->fw_human_readable));
1135         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
1136                 sizeof(dump_info->dev_human_readable));
1137         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
1138                 sizeof(dump_info->bus_human_readable));
1139
1140         dump_data = iwl_fw_error_next_data(dump_data);
1141         /* We only dump the FIFOs if the FW is in error state */
1142         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status))
1143                 iwl_mvm_dump_fifos(mvm, &dump_data);
1144
1145         if (mvm->fw_dump_desc) {
1146                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_ERROR_INFO);
1147                 dump_data->len = cpu_to_le32(sizeof(*dump_trig) +
1148                                              mvm->fw_dump_desc->len);
1149                 dump_trig = (void *)dump_data->data;
1150                 memcpy(dump_trig, &mvm->fw_dump_desc->trig_desc,
1151                        sizeof(*dump_trig) + mvm->fw_dump_desc->len);
1152
1153                 /* now we can free this copy */
1154                 iwl_mvm_free_fw_dump_desc(mvm);
1155                 dump_data = iwl_fw_error_next_data(dump_data);
1156         }
1157
1158         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1159         dump_data->len = cpu_to_le32(sram_len + sizeof(*dump_mem));
1160         dump_mem = (void *)dump_data->data;
1161         dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1162         dump_mem->offset = cpu_to_le32(sram_ofs);
1163         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_mem->data,
1164                                  sram_len);
1165
1166         if (smem_len) {
1167                 dump_data = iwl_fw_error_next_data(dump_data);
1168                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1169                 dump_data->len = cpu_to_le32(smem_len + sizeof(*dump_mem));
1170                 dump_mem = (void *)dump_data->data;
1171                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SMEM);
1172                 dump_mem->offset = cpu_to_le32(mvm->cfg->smem_offset);
1173                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->smem_offset,
1174                                          dump_mem->data, smem_len);
1175         }
1176
1177         if (sram2_len) {
1178                 dump_data = iwl_fw_error_next_data(dump_data);
1179                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1180                 dump_data->len = cpu_to_le32(sram2_len + sizeof(*dump_mem));
1181                 dump_mem = (void *)dump_data->data;
1182                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1183                 dump_mem->offset = cpu_to_le32(mvm->cfg->dccm2_offset);
1184                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->dccm2_offset,
1185                                          dump_mem->data, sram2_len);
1186         }
1187
1188         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1189             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP) {
1190                 dump_data = iwl_fw_error_next_data(dump_data);
1191                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1192                 dump_data->len = cpu_to_le32(IWL8260_ICCM_LEN +
1193                                              sizeof(*dump_mem));
1194                 dump_mem = (void *)dump_data->data;
1195                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1196                 dump_mem->offset = cpu_to_le32(IWL8260_ICCM_OFFSET);
1197                 iwl_trans_read_mem_bytes(mvm->trans, IWL8260_ICCM_OFFSET,
1198                                          dump_mem->data, IWL8260_ICCM_LEN);
1199         }
1200
1201         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
1202         fw_error_dump->op_mode_len = file_len;
1203         if (fw_error_dump->trans_ptr)
1204                 file_len += fw_error_dump->trans_ptr->len;
1205         dump_file->file_len = cpu_to_le32(file_len);
1206
1207         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
1208                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
1209
1210         clear_bit(IWL_MVM_STATUS_DUMPING_FW_LOG, &mvm->status);
1211 }
1212
1213 struct iwl_mvm_dump_desc iwl_mvm_dump_desc_assert = {
1214         .trig_desc = {
1215                 .type = cpu_to_le32(FW_DBG_TRIGGER_FW_ASSERT),
1216         },
1217 };
1218
1219 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
1220 {
1221         /* clear the D3 reconfig, we only need it to avoid dumping a
1222          * firmware coredump on reconfiguration, we shouldn't do that
1223          * on D3->D0 transition
1224          */
1225         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
1226                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
1227                 iwl_mvm_fw_error_dump(mvm);
1228         }
1229
1230         /* cleanup all stale references (scan, roc), but keep the
1231          * ucode_down ref until reconfig is complete
1232          */
1233         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1234
1235         iwl_trans_stop_device(mvm->trans);
1236
1237         mvm->scan_status = 0;
1238         mvm->ps_disabled = false;
1239         mvm->calibrating = false;
1240
1241         /* just in case one was running */
1242         ieee80211_remain_on_channel_expired(mvm->hw);
1243
1244         ieee80211_iterate_active_interfaces_atomic(
1245                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1246                 iwl_mvm_cleanup_iterator, mvm);
1247
1248         mvm->p2p_device_vif = NULL;
1249         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1250
1251         iwl_mvm_reset_phy_ctxts(mvm);
1252         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
1253         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1254         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1255         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1256         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
1257         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1258         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
1259         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
1260         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
1261
1262         ieee80211_wake_queues(mvm->hw);
1263
1264         /* clear any stale d0i3 state */
1265         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1266
1267         mvm->vif_count = 0;
1268         mvm->rx_ba_sessions = 0;
1269         mvm->fw_dbg_conf = FW_DBG_INVALID;
1270
1271         /* keep statistics ticking */
1272         iwl_mvm_accu_radio_stats(mvm);
1273 }
1274
1275 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1276 {
1277         int ret;
1278
1279         lockdep_assert_held(&mvm->mutex);
1280
1281         /* Clean up some internal and mac80211 state on restart */
1282         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1283                 iwl_mvm_restart_cleanup(mvm);
1284
1285         ret = iwl_mvm_up(mvm);
1286
1287         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1288                 /* Something went wrong - we need to finish some cleanup
1289                  * that normally iwl_mvm_mac_restart_complete() below
1290                  * would do.
1291                  */
1292                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1293                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1294         }
1295
1296         return ret;
1297 }
1298
1299 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1300 {
1301         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1302         int ret;
1303
1304         /* Some hw restart cleanups must not hold the mutex */
1305         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1306                 /*
1307                  * Make sure we are out of d0i3. This is needed
1308                  * to make sure the reference accounting is correct
1309                  * (and there is no stale d0i3_exit_work).
1310                  */
1311                 wait_event_timeout(mvm->d0i3_exit_waitq,
1312                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1313                                              &mvm->status),
1314                                    HZ);
1315         }
1316
1317         mutex_lock(&mvm->mutex);
1318         ret = __iwl_mvm_mac_start(mvm);
1319         mutex_unlock(&mvm->mutex);
1320
1321         return ret;
1322 }
1323
1324 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1325 {
1326         int ret;
1327
1328         mutex_lock(&mvm->mutex);
1329
1330         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1331         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1332         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1333         if (ret)
1334                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1335                         ret);
1336
1337         /* allow transport/FW low power modes */
1338         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1339
1340         /*
1341          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1342          * of packets the FW sent out, so we must reconnect.
1343          */
1344         iwl_mvm_teardown_tdls_peers(mvm);
1345
1346         mutex_unlock(&mvm->mutex);
1347 }
1348
1349 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1350 {
1351         bool exit_now;
1352
1353         if (!iwl_mvm_is_d0i3_supported(mvm))
1354                 return;
1355
1356         mutex_lock(&mvm->d0i3_suspend_mutex);
1357         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1358         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
1359                                         &mvm->d0i3_suspend_flags);
1360         mutex_unlock(&mvm->d0i3_suspend_mutex);
1361
1362         if (exit_now) {
1363                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
1364                 _iwl_mvm_exit_d0i3(mvm);
1365         }
1366
1367         if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND)
1368                 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
1369                                         !test_bit(IWL_MVM_STATUS_IN_D0I3,
1370                                                   &mvm->status),
1371                                         HZ))
1372                         WARN_ONCE(1, "D0i3 exit on resume timed out\n");
1373 }
1374
1375 static void
1376 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1377                               enum ieee80211_reconfig_type reconfig_type)
1378 {
1379         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1380
1381         switch (reconfig_type) {
1382         case IEEE80211_RECONFIG_TYPE_RESTART:
1383                 iwl_mvm_restart_complete(mvm);
1384                 break;
1385         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1386                 iwl_mvm_resume_complete(mvm);
1387                 break;
1388         }
1389 }
1390
1391 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1392 {
1393         lockdep_assert_held(&mvm->mutex);
1394
1395         /* firmware counters are obviously reset now, but we shouldn't
1396          * partially track so also clear the fw_reset_accu counters.
1397          */
1398         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1399
1400         /*
1401          * Disallow low power states when the FW is down by taking
1402          * the UCODE_DOWN ref. in case of ongoing hw restart the
1403          * ref is already taken, so don't take it again.
1404          */
1405         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1406                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1407
1408         /* async_handlers_wk is now blocked */
1409
1410         /*
1411          * The work item could be running or queued if the
1412          * ROC time event stops just as we get here.
1413          */
1414         cancel_work_sync(&mvm->roc_done_wk);
1415
1416         iwl_trans_stop_device(mvm->trans);
1417
1418         iwl_mvm_async_handlers_purge(mvm);
1419         /* async_handlers_list is empty and will stay empty: HW is stopped */
1420
1421         /* the fw is stopped, the aux sta is dead: clean up driver state */
1422         iwl_mvm_del_aux_sta(mvm);
1423
1424         /*
1425          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1426          * won't be called in this case).
1427          */
1428         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1429
1430         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1431          * make sure there's nothing left there and warn if any is found.
1432          */
1433         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1434                 int i;
1435
1436                 for (i = 0; i < mvm->max_scans; i++) {
1437                         if (WARN_ONCE(mvm->scan_uid[i],
1438                                       "UMAC scan UID %d was not cleaned\n",
1439                                       mvm->scan_uid[i]))
1440                                 mvm->scan_uid[i] = 0;
1441                 }
1442         }
1443
1444         mvm->ucode_loaded = false;
1445 }
1446
1447 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1448 {
1449         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1450
1451         flush_work(&mvm->d0i3_exit_work);
1452         flush_work(&mvm->async_handlers_wk);
1453         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1454         iwl_mvm_free_fw_dump_desc(mvm);
1455
1456         mutex_lock(&mvm->mutex);
1457         __iwl_mvm_mac_stop(mvm);
1458         mutex_unlock(&mvm->mutex);
1459
1460         /*
1461          * The worker might have been waiting for the mutex, let it run and
1462          * discover that its list is now empty.
1463          */
1464         cancel_work_sync(&mvm->async_handlers_wk);
1465 }
1466
1467 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1468 {
1469         u16 i;
1470
1471         lockdep_assert_held(&mvm->mutex);
1472
1473         for (i = 0; i < NUM_PHY_CTX; i++)
1474                 if (!mvm->phy_ctxts[i].ref)
1475                         return &mvm->phy_ctxts[i];
1476
1477         IWL_ERR(mvm, "No available PHY context\n");
1478         return NULL;
1479 }
1480
1481 static int iwl_mvm_set_tx_power_old(struct iwl_mvm *mvm,
1482                                     struct ieee80211_vif *vif, s8 tx_power)
1483 {
1484         /* FW is in charge of regulatory enforcement */
1485         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
1486                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
1487                 .pwr_restriction = cpu_to_le16(tx_power),
1488         };
1489
1490         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1491                                     sizeof(reduce_txpwr_cmd),
1492                                     &reduce_txpwr_cmd);
1493 }
1494
1495 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1496                                 s16 tx_power)
1497 {
1498         struct iwl_dev_tx_power_cmd cmd = {
1499                 .set_mode = 0,
1500                 .mac_context_id =
1501                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1502                 .pwr_restriction = cpu_to_le16(8 * tx_power),
1503         };
1504
1505         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_TX_POWER_DEV))
1506                 return iwl_mvm_set_tx_power_old(mvm, vif, tx_power);
1507
1508         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1509                 cmd.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1510
1511         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1512                                     sizeof(cmd), &cmd);
1513 }
1514
1515 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1516                                      struct ieee80211_vif *vif)
1517 {
1518         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1519         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1520         int ret;
1521
1522         mvmvif->mvm = mvm;
1523
1524         /*
1525          * make sure D0i3 exit is completed, otherwise a target access
1526          * during tx queue configuration could be done when still in
1527          * D0i3 state.
1528          */
1529         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1530         if (ret)
1531                 return ret;
1532
1533         /*
1534          * Not much to do here. The stack will not allow interface
1535          * types or combinations that we didn't advertise, so we
1536          * don't really have to check the types.
1537          */
1538
1539         mutex_lock(&mvm->mutex);
1540
1541         /* make sure that beacon statistics don't go backwards with FW reset */
1542         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1543                 mvmvif->beacon_stats.accu_num_beacons +=
1544                         mvmvif->beacon_stats.num_beacons;
1545
1546         /* Allocate resources for the MAC context, and add it to the fw  */
1547         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1548         if (ret)
1549                 goto out_unlock;
1550
1551         /* Counting number of interfaces is needed for legacy PM */
1552         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1553                 mvm->vif_count++;
1554
1555         /*
1556          * The AP binding flow can be done only after the beacon
1557          * template is configured (which happens only in the mac80211
1558          * start_ap() flow), and adding the broadcast station can happen
1559          * only after the binding.
1560          * In addition, since modifying the MAC before adding a bcast
1561          * station is not allowed by the FW, delay the adding of MAC context to
1562          * the point where we can also add the bcast station.
1563          * In short: there's not much we can do at this point, other than
1564          * allocating resources :)
1565          */
1566         if (vif->type == NL80211_IFTYPE_AP ||
1567             vif->type == NL80211_IFTYPE_ADHOC) {
1568                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1569                 if (ret) {
1570                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1571                         goto out_release;
1572                 }
1573
1574                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1575                 goto out_unlock;
1576         }
1577
1578         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1579         if (ret)
1580                 goto out_release;
1581
1582         ret = iwl_mvm_power_update_mac(mvm);
1583         if (ret)
1584                 goto out_remove_mac;
1585
1586         /* beacon filtering */
1587         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1588         if (ret)
1589                 goto out_remove_mac;
1590
1591         if (!mvm->bf_allowed_vif &&
1592             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1593                 mvm->bf_allowed_vif = mvmvif;
1594                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1595                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1596         }
1597
1598         /*
1599          * P2P_DEVICE interface does not have a channel context assigned to it,
1600          * so a dedicated PHY context is allocated to it and the corresponding
1601          * MAC context is bound to it at this stage.
1602          */
1603         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1604
1605                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1606                 if (!mvmvif->phy_ctxt) {
1607                         ret = -ENOSPC;
1608                         goto out_free_bf;
1609                 }
1610
1611                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1612                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1613                 if (ret)
1614                         goto out_unref_phy;
1615
1616                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1617                 if (ret)
1618                         goto out_unbind;
1619
1620                 /* Save a pointer to p2p device vif, so it can later be used to
1621                  * update the p2p device MAC when a GO is started/stopped */
1622                 mvm->p2p_device_vif = vif;
1623         }
1624
1625         iwl_mvm_vif_dbgfs_register(mvm, vif);
1626         goto out_unlock;
1627
1628  out_unbind:
1629         iwl_mvm_binding_remove_vif(mvm, vif);
1630  out_unref_phy:
1631         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1632  out_free_bf:
1633         if (mvm->bf_allowed_vif == mvmvif) {
1634                 mvm->bf_allowed_vif = NULL;
1635                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1636                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1637         }
1638  out_remove_mac:
1639         mvmvif->phy_ctxt = NULL;
1640         iwl_mvm_mac_ctxt_remove(mvm, vif);
1641  out_release:
1642         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1643                 mvm->vif_count--;
1644
1645         iwl_mvm_mac_ctxt_release(mvm, vif);
1646  out_unlock:
1647         mutex_unlock(&mvm->mutex);
1648
1649         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1650
1651         return ret;
1652 }
1653
1654 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1655                                         struct ieee80211_vif *vif)
1656 {
1657         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1658
1659         if (tfd_msk) {
1660                 /*
1661                  * mac80211 first removes all the stations of the vif and
1662                  * then removes the vif. When it removes a station it also
1663                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1664                  * of all the stations of this vif are closed, and the queues
1665                  * of these AMPDU sessions are properly closed.
1666                  * We still need to take care of the shared queues of the vif.
1667                  * Flush them here.
1668                  */
1669                 mutex_lock(&mvm->mutex);
1670                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1671                 mutex_unlock(&mvm->mutex);
1672
1673                 /*
1674                  * There are transports that buffer a few frames in the host.
1675                  * For these, the flush above isn't enough since while we were
1676                  * flushing, the transport might have sent more frames to the
1677                  * device. To solve this, wait here until the transport is
1678                  * empty. Technically, this could have replaced the flush
1679                  * above, but flush is much faster than draining. So flush
1680                  * first, and drain to make sure we have no frames in the
1681                  * transport anymore.
1682                  * If a station still had frames on the shared queues, it is
1683                  * already marked as draining, so to complete the draining, we
1684                  * just need to wait until the transport is empty.
1685                  */
1686                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1687         }
1688
1689         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1690                 /*
1691                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1692                  * We assume here that all the packets sent to the OFFCHANNEL
1693                  * queue are sent in ROC session.
1694                  */
1695                 flush_work(&mvm->roc_done_wk);
1696         } else {
1697                 /*
1698                  * By now, all the AC queues are empty. The AGG queues are
1699                  * empty too. We already got all the Tx responses for all the
1700                  * packets in the queues. The drain work can have been
1701                  * triggered. Flush it.
1702                  */
1703                 flush_work(&mvm->sta_drained_wk);
1704         }
1705 }
1706
1707 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1708                                          struct ieee80211_vif *vif)
1709 {
1710         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1711         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1712
1713         iwl_mvm_prepare_mac_removal(mvm, vif);
1714
1715         mutex_lock(&mvm->mutex);
1716
1717         if (mvm->bf_allowed_vif == mvmvif) {
1718                 mvm->bf_allowed_vif = NULL;
1719                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1720                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1721         }
1722
1723         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1724
1725         /*
1726          * For AP/GO interface, the tear down of the resources allocated to the
1727          * interface is be handled as part of the stop_ap flow.
1728          */
1729         if (vif->type == NL80211_IFTYPE_AP ||
1730             vif->type == NL80211_IFTYPE_ADHOC) {
1731 #ifdef CONFIG_NL80211_TESTMODE
1732                 if (vif == mvm->noa_vif) {
1733                         mvm->noa_vif = NULL;
1734                         mvm->noa_duration = 0;
1735                 }
1736 #endif
1737                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1738                 goto out_release;
1739         }
1740
1741         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1742                 mvm->p2p_device_vif = NULL;
1743                 iwl_mvm_rm_bcast_sta(mvm, vif);
1744                 iwl_mvm_binding_remove_vif(mvm, vif);
1745                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1746                 mvmvif->phy_ctxt = NULL;
1747         }
1748
1749         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1750                 mvm->vif_count--;
1751
1752         iwl_mvm_power_update_mac(mvm);
1753         iwl_mvm_mac_ctxt_remove(mvm, vif);
1754
1755 out_release:
1756         iwl_mvm_mac_ctxt_release(mvm, vif);
1757         mutex_unlock(&mvm->mutex);
1758 }
1759
1760 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1761 {
1762         return 0;
1763 }
1764
1765 struct iwl_mvm_mc_iter_data {
1766         struct iwl_mvm *mvm;
1767         int port_id;
1768 };
1769
1770 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1771                                       struct ieee80211_vif *vif)
1772 {
1773         struct iwl_mvm_mc_iter_data *data = _data;
1774         struct iwl_mvm *mvm = data->mvm;
1775         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1776         int ret, len;
1777
1778         /* if we don't have free ports, mcast frames will be dropped */
1779         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1780                 return;
1781
1782         if (vif->type != NL80211_IFTYPE_STATION ||
1783             !vif->bss_conf.assoc)
1784                 return;
1785
1786         cmd->port_id = data->port_id++;
1787         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1788         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1789
1790         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1791         if (ret)
1792                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1793 }
1794
1795 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1796 {
1797         struct iwl_mvm_mc_iter_data iter_data = {
1798                 .mvm = mvm,
1799         };
1800
1801         lockdep_assert_held(&mvm->mutex);
1802
1803         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1804                 return;
1805
1806         ieee80211_iterate_active_interfaces_atomic(
1807                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1808                 iwl_mvm_mc_iface_iterator, &iter_data);
1809 }
1810
1811 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1812                                      struct netdev_hw_addr_list *mc_list)
1813 {
1814         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1815         struct iwl_mcast_filter_cmd *cmd;
1816         struct netdev_hw_addr *addr;
1817         int addr_count;
1818         bool pass_all;
1819         int len;
1820
1821         addr_count = netdev_hw_addr_list_count(mc_list);
1822         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1823                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1824         if (pass_all)
1825                 addr_count = 0;
1826
1827         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1828         cmd = kzalloc(len, GFP_ATOMIC);
1829         if (!cmd)
1830                 return 0;
1831
1832         if (pass_all) {
1833                 cmd->pass_all = 1;
1834                 return (u64)(unsigned long)cmd;
1835         }
1836
1837         netdev_hw_addr_list_for_each(addr, mc_list) {
1838                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1839                                    cmd->count, addr->addr);
1840                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1841                        addr->addr, ETH_ALEN);
1842                 cmd->count++;
1843         }
1844
1845         return (u64)(unsigned long)cmd;
1846 }
1847
1848 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1849                                      unsigned int changed_flags,
1850                                      unsigned int *total_flags,
1851                                      u64 multicast)
1852 {
1853         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1854         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1855
1856         mutex_lock(&mvm->mutex);
1857
1858         /* replace previous configuration */
1859         kfree(mvm->mcast_filter_cmd);
1860         mvm->mcast_filter_cmd = cmd;
1861
1862         if (!cmd)
1863                 goto out;
1864
1865         iwl_mvm_recalc_multicast(mvm);
1866 out:
1867         mutex_unlock(&mvm->mutex);
1868         *total_flags = 0;
1869 }
1870
1871 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1872 struct iwl_bcast_iter_data {
1873         struct iwl_mvm *mvm;
1874         struct iwl_bcast_filter_cmd *cmd;
1875         u8 current_filter;
1876 };
1877
1878 static void
1879 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1880                          const struct iwl_fw_bcast_filter *in_filter,
1881                          struct iwl_fw_bcast_filter *out_filter)
1882 {
1883         struct iwl_fw_bcast_filter_attr *attr;
1884         int i;
1885
1886         memcpy(out_filter, in_filter, sizeof(*out_filter));
1887
1888         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1889                 attr = &out_filter->attrs[i];
1890
1891                 if (!attr->mask)
1892                         break;
1893
1894                 switch (attr->reserved1) {
1895                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1896                         if (vif->bss_conf.arp_addr_cnt != 1) {
1897                                 attr->mask = 0;
1898                                 continue;
1899                         }
1900
1901                         attr->val = vif->bss_conf.arp_addr_list[0];
1902                         break;
1903                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1904                         attr->val = *(__be32 *)&vif->addr[2];
1905                         break;
1906                 default:
1907                         break;
1908                 }
1909                 attr->reserved1 = 0;
1910                 out_filter->num_attrs++;
1911         }
1912 }
1913
1914 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1915                                           struct ieee80211_vif *vif)
1916 {
1917         struct iwl_bcast_iter_data *data = _data;
1918         struct iwl_mvm *mvm = data->mvm;
1919         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1920         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1921         struct iwl_fw_bcast_mac *bcast_mac;
1922         int i;
1923
1924         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1925                 return;
1926
1927         bcast_mac = &cmd->macs[mvmvif->id];
1928
1929         /*
1930          * enable filtering only for associated stations, but not for P2P
1931          * Clients
1932          */
1933         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1934             !vif->bss_conf.assoc)
1935                 return;
1936
1937         bcast_mac->default_discard = 1;
1938
1939         /* copy all configured filters */
1940         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1941                 /*
1942                  * Make sure we don't exceed our filters limit.
1943                  * if there is still a valid filter to be configured,
1944                  * be on the safe side and just allow bcast for this mac.
1945                  */
1946                 if (WARN_ON_ONCE(data->current_filter >=
1947                                  ARRAY_SIZE(cmd->filters))) {
1948                         bcast_mac->default_discard = 0;
1949                         bcast_mac->attached_filters = 0;
1950                         break;
1951                 }
1952
1953                 iwl_mvm_set_bcast_filter(vif,
1954                                          &mvm->bcast_filters[i],
1955                                          &cmd->filters[data->current_filter]);
1956
1957                 /* skip current filter if it contains no attributes */
1958                 if (!cmd->filters[data->current_filter].num_attrs)
1959                         continue;
1960
1961                 /* attach the filter to current mac */
1962                 bcast_mac->attached_filters |=
1963                                 cpu_to_le16(BIT(data->current_filter));
1964
1965                 data->current_filter++;
1966         }
1967 }
1968
1969 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1970                                     struct iwl_bcast_filter_cmd *cmd)
1971 {
1972         struct iwl_bcast_iter_data iter_data = {
1973                 .mvm = mvm,
1974                 .cmd = cmd,
1975         };
1976
1977         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1978                 return false;
1979
1980         memset(cmd, 0, sizeof(*cmd));
1981         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1982         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1983
1984 #ifdef CONFIG_IWLWIFI_DEBUGFS
1985         /* use debugfs filters/macs if override is configured */
1986         if (mvm->dbgfs_bcast_filtering.override) {
1987                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1988                        sizeof(cmd->filters));
1989                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1990                        sizeof(cmd->macs));
1991                 return true;
1992         }
1993 #endif
1994
1995         /* if no filters are configured, do nothing */
1996         if (!mvm->bcast_filters)
1997                 return false;
1998
1999         /* configure and attach these filters for each associated sta vif */
2000         ieee80211_iterate_active_interfaces(
2001                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2002                 iwl_mvm_bcast_filter_iterator, &iter_data);
2003
2004         return true;
2005 }
2006 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2007                                           struct ieee80211_vif *vif)
2008 {
2009         struct iwl_bcast_filter_cmd cmd;
2010
2011         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
2012                 return 0;
2013
2014         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
2015                 return 0;
2016
2017         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
2018                                     sizeof(cmd), &cmd);
2019 }
2020 #else
2021 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2022                                                  struct ieee80211_vif *vif)
2023 {
2024         return 0;
2025 }
2026 #endif
2027
2028 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
2029                                              struct ieee80211_vif *vif,
2030                                              struct ieee80211_bss_conf *bss_conf,
2031                                              u32 changes)
2032 {
2033         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2034         int ret;
2035
2036         /*
2037          * Re-calculate the tsf id, as the master-slave relations depend on the
2038          * beacon interval, which was not known when the station interface was
2039          * added.
2040          */
2041         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
2042                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2043
2044         /*
2045          * If we're not associated yet, take the (new) BSSID before associating
2046          * so the firmware knows. If we're already associated, then use the old
2047          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
2048          * branch for disassociation below.
2049          */
2050         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
2051                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2052
2053         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
2054         if (ret)
2055                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2056
2057         /* after sending it once, adopt mac80211 data */
2058         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2059         mvmvif->associated = bss_conf->assoc;
2060
2061         if (changes & BSS_CHANGED_ASSOC) {
2062                 if (bss_conf->assoc) {
2063                         /* clear statistics to get clean beacon counter */
2064                         iwl_mvm_request_statistics(mvm, true);
2065                         memset(&mvmvif->beacon_stats, 0,
2066                                sizeof(mvmvif->beacon_stats));
2067
2068                         /* add quota for this interface */
2069                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
2070                         if (ret) {
2071                                 IWL_ERR(mvm, "failed to update quotas\n");
2072                                 return;
2073                         }
2074
2075                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
2076                                      &mvm->status)) {
2077                                 /*
2078                                  * If we're restarting then the firmware will
2079                                  * obviously have lost synchronisation with
2080                                  * the AP. It will attempt to synchronise by
2081                                  * itself, but we can make it more reliable by
2082                                  * scheduling a session protection time event.
2083                                  *
2084                                  * The firmware needs to receive a beacon to
2085                                  * catch up with synchronisation, use 110% of
2086                                  * the beacon interval.
2087                                  *
2088                                  * Set a large maximum delay to allow for more
2089                                  * than a single interface.
2090                                  */
2091                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
2092                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
2093                                                         5 * dur, false);
2094                         }
2095
2096                         iwl_mvm_sf_update(mvm, vif, false);
2097                         iwl_mvm_power_vif_assoc(mvm, vif);
2098                         if (vif->p2p) {
2099                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
2100                                 iwl_mvm_update_smps(mvm, vif,
2101                                                     IWL_MVM_SMPS_REQ_PROT,
2102                                                     IEEE80211_SMPS_DYNAMIC);
2103                         }
2104                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2105                         /*
2106                          * If update fails - SF might be running in associated
2107                          * mode while disassociated - which is forbidden.
2108                          */
2109                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
2110                                   "Failed to update SF upon disassociation\n");
2111
2112                         /* remove AP station now that the MAC is unassoc */
2113                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
2114                         if (ret)
2115                                 IWL_ERR(mvm, "failed to remove AP station\n");
2116
2117                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
2118                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
2119                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
2120                         /* remove quota for this interface */
2121                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2122                         if (ret)
2123                                 IWL_ERR(mvm, "failed to update quotas\n");
2124
2125                         if (vif->p2p)
2126                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
2127
2128                         /* this will take the cleared BSSID from bss_conf */
2129                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2130                         if (ret)
2131                                 IWL_ERR(mvm,
2132                                         "failed to update MAC %pM (clear after unassoc)\n",
2133                                         vif->addr);
2134                 }
2135
2136                 iwl_mvm_recalc_multicast(mvm);
2137                 iwl_mvm_configure_bcast_filter(mvm, vif);
2138
2139                 /* reset rssi values */
2140                 mvmvif->bf_data.ave_beacon_signal = 0;
2141
2142                 iwl_mvm_bt_coex_vif_change(mvm);
2143                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
2144                                     IEEE80211_SMPS_AUTOMATIC);
2145         } else if (changes & BSS_CHANGED_BEACON_INFO) {
2146                 /*
2147                  * We received a beacon _after_ association so
2148                  * remove the session protection.
2149                  */
2150                 iwl_mvm_remove_time_event(mvm, mvmvif,
2151                                           &mvmvif->time_event_data);
2152         }
2153
2154         if (changes & BSS_CHANGED_BEACON_INFO) {
2155                 iwl_mvm_sf_update(mvm, vif, false);
2156                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2157         }
2158
2159         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
2160                 ret = iwl_mvm_power_update_mac(mvm);
2161                 if (ret)
2162                         IWL_ERR(mvm, "failed to update power mode\n");
2163         }
2164
2165         if (changes & BSS_CHANGED_TXPOWER) {
2166                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2167                                 bss_conf->txpower);
2168                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2169         }
2170
2171         if (changes & BSS_CHANGED_CQM) {
2172                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
2173                 /* reset cqm events tracking */
2174                 mvmvif->bf_data.last_cqm_event = 0;
2175                 if (mvmvif->bf_data.bf_enabled) {
2176                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2177                         if (ret)
2178                                 IWL_ERR(mvm,
2179                                         "failed to update CQM thresholds\n");
2180                 }
2181         }
2182
2183         if (changes & BSS_CHANGED_ARP_FILTER) {
2184                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2185                 iwl_mvm_configure_bcast_filter(mvm, vif);
2186         }
2187 }
2188
2189 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2190                                  struct ieee80211_vif *vif)
2191 {
2192         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2193         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2194         int ret;
2195
2196         /*
2197          * iwl_mvm_mac_ctxt_add() might read directly from the device
2198          * (the system time), so make sure it is available.
2199          */
2200         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2201         if (ret)
2202                 return ret;
2203
2204         mutex_lock(&mvm->mutex);
2205
2206         /* Send the beacon template */
2207         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2208         if (ret)
2209                 goto out_unlock;
2210
2211         /*
2212          * Re-calculate the tsf id, as the master-slave relations depend on the
2213          * beacon interval, which was not known when the AP interface was added.
2214          */
2215         if (vif->type == NL80211_IFTYPE_AP)
2216                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2217
2218         /* Add the mac context */
2219         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2220         if (ret)
2221                 goto out_unlock;
2222
2223         /* Perform the binding */
2224         ret = iwl_mvm_binding_add_vif(mvm, vif);
2225         if (ret)
2226                 goto out_remove;
2227
2228         /* Send the bcast station. At this stage the TBTT and DTIM time events
2229          * are added and applied to the scheduler */
2230         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2231         if (ret)
2232                 goto out_unbind;
2233
2234         /* must be set before quota calculations */
2235         mvmvif->ap_ibss_active = true;
2236
2237         /* power updated needs to be done before quotas */
2238         iwl_mvm_power_update_mac(mvm);
2239
2240         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2241         if (ret)
2242                 goto out_quota_failed;
2243
2244         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2245         if (vif->p2p && mvm->p2p_device_vif)
2246                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2247
2248         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2249
2250         iwl_mvm_bt_coex_vif_change(mvm);
2251
2252         /* we don't support TDLS during DCM */
2253         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2254                 iwl_mvm_teardown_tdls_peers(mvm);
2255
2256         goto out_unlock;
2257
2258 out_quota_failed:
2259         iwl_mvm_power_update_mac(mvm);
2260         mvmvif->ap_ibss_active = false;
2261         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2262 out_unbind:
2263         iwl_mvm_binding_remove_vif(mvm, vif);
2264 out_remove:
2265         iwl_mvm_mac_ctxt_remove(mvm, vif);
2266 out_unlock:
2267         mutex_unlock(&mvm->mutex);
2268         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2269         return ret;
2270 }
2271
2272 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2273                                  struct ieee80211_vif *vif)
2274 {
2275         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2276         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2277
2278         iwl_mvm_prepare_mac_removal(mvm, vif);
2279
2280         mutex_lock(&mvm->mutex);
2281
2282         /* Handle AP stop while in CSA */
2283         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2284                 iwl_mvm_remove_time_event(mvm, mvmvif,
2285                                           &mvmvif->time_event_data);
2286                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2287         }
2288
2289         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2290                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2291                 mvm->csa_tx_block_bcn_timeout = 0;
2292         }
2293
2294         mvmvif->ap_ibss_active = false;
2295         mvm->ap_last_beacon_gp2 = 0;
2296
2297         iwl_mvm_bt_coex_vif_change(mvm);
2298
2299         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2300
2301         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2302         if (vif->p2p && mvm->p2p_device_vif)
2303                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2304
2305         iwl_mvm_update_quotas(mvm, false, NULL);
2306         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2307         iwl_mvm_binding_remove_vif(mvm, vif);
2308
2309         iwl_mvm_power_update_mac(mvm);
2310
2311         iwl_mvm_mac_ctxt_remove(mvm, vif);
2312
2313         mutex_unlock(&mvm->mutex);
2314 }
2315
2316 static void
2317 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2318                                  struct ieee80211_vif *vif,
2319                                  struct ieee80211_bss_conf *bss_conf,
2320                                  u32 changes)
2321 {
2322         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2323
2324         /* Changes will be applied when the AP/IBSS is started */
2325         if (!mvmvif->ap_ibss_active)
2326                 return;
2327
2328         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2329                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2330             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2331                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2332
2333         /* Need to send a new beacon template to the FW */
2334         if (changes & BSS_CHANGED_BEACON &&
2335             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2336                 IWL_WARN(mvm, "Failed updating beacon data\n");
2337
2338         if (changes & BSS_CHANGED_TXPOWER) {
2339                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2340                                 bss_conf->txpower);
2341                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2342         }
2343
2344 }
2345
2346 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2347                                      struct ieee80211_vif *vif,
2348                                      struct ieee80211_bss_conf *bss_conf,
2349                                      u32 changes)
2350 {
2351         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2352
2353         /*
2354          * iwl_mvm_bss_info_changed_station() might call
2355          * iwl_mvm_protect_session(), which reads directly from
2356          * the device (the system time), so make sure it is available.
2357          */
2358         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2359                 return;
2360
2361         mutex_lock(&mvm->mutex);
2362
2363         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2364                 iwl_mvm_scan_offload_stop(mvm, true);
2365
2366         switch (vif->type) {
2367         case NL80211_IFTYPE_STATION:
2368                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2369                 break;
2370         case NL80211_IFTYPE_AP:
2371         case NL80211_IFTYPE_ADHOC:
2372                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2373                 break;
2374         default:
2375                 /* shouldn't happen */
2376                 WARN_ON_ONCE(1);
2377         }
2378
2379         mutex_unlock(&mvm->mutex);
2380         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2381 }
2382
2383 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2384                                struct ieee80211_vif *vif,
2385                                struct ieee80211_scan_request *hw_req)
2386 {
2387         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2388         int ret;
2389
2390         if (hw_req->req.n_channels == 0 ||
2391             hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2392                 return -EINVAL;
2393
2394         mutex_lock(&mvm->mutex);
2395         ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2396         mutex_unlock(&mvm->mutex);
2397
2398         return ret;
2399 }
2400
2401 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2402                                        struct ieee80211_vif *vif)
2403 {
2404         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2405
2406         mutex_lock(&mvm->mutex);
2407
2408         /* Due to a race condition, it's possible that mac80211 asks
2409          * us to stop a hw_scan when it's already stopped.  This can
2410          * happen, for instance, if we stopped the scan ourselves,
2411          * called ieee80211_scan_completed() and the userspace called
2412          * cancel scan scan before ieee80211_scan_work() could run.
2413          * To handle that, simply return if the scan is not running.
2414         */
2415         /* FIXME: for now, we ignore this race for UMAC scans, since
2416          * they don't set the scan_status.
2417          */
2418         if ((mvm->scan_status & IWL_MVM_SCAN_REGULAR) ||
2419             (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN))
2420                 iwl_mvm_cancel_scan(mvm);
2421
2422         mutex_unlock(&mvm->mutex);
2423 }
2424
2425 static void
2426 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2427                                   struct ieee80211_sta *sta, u16 tids,
2428                                   int num_frames,
2429                                   enum ieee80211_frame_release_type reason,
2430                                   bool more_data)
2431 {
2432         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2433
2434         /* Called when we need to transmit (a) frame(s) from mac80211 */
2435
2436         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2437                                           tids, more_data, false);
2438 }
2439
2440 static void
2441 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2442                                     struct ieee80211_sta *sta, u16 tids,
2443                                     int num_frames,
2444                                     enum ieee80211_frame_release_type reason,
2445                                     bool more_data)
2446 {
2447         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2448
2449         /* Called when we need to transmit (a) frame(s) from agg queue */
2450
2451         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2452                                           tids, more_data, true);
2453 }
2454
2455 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2456                                    struct ieee80211_vif *vif,
2457                                    enum sta_notify_cmd cmd,
2458                                    struct ieee80211_sta *sta)
2459 {
2460         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2461         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2462         unsigned long txqs = 0, tids = 0;
2463         int tid;
2464
2465         spin_lock_bh(&mvmsta->lock);
2466         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2467                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2468
2469                 if (tid_data->state != IWL_AGG_ON &&
2470                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2471                         continue;
2472
2473                 __set_bit(tid_data->txq_id, &txqs);
2474
2475                 if (iwl_mvm_tid_queued(tid_data) == 0)
2476                         continue;
2477
2478                 __set_bit(tid, &tids);
2479         }
2480
2481         switch (cmd) {
2482         case STA_NOTIFY_SLEEP:
2483                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2484                         ieee80211_sta_block_awake(hw, sta, true);
2485
2486                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2487                         ieee80211_sta_set_buffered(sta, tid, true);
2488
2489                 if (txqs)
2490                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2491                 /*
2492                  * The fw updates the STA to be asleep. Tx packets on the Tx
2493                  * queues to this station will not be transmitted. The fw will
2494                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2495                  */
2496                 break;
2497         case STA_NOTIFY_AWAKE:
2498                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2499                         break;
2500
2501                 if (txqs)
2502                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2503                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2504                 break;
2505         default:
2506                 break;
2507         }
2508         spin_unlock_bh(&mvmsta->lock);
2509 }
2510
2511 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2512                                        struct ieee80211_vif *vif,
2513                                        struct ieee80211_sta *sta)
2514 {
2515         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2516         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2517
2518         /*
2519          * This is called before mac80211 does RCU synchronisation,
2520          * so here we already invalidate our internal RCU-protected
2521          * station pointer. The rest of the code will thus no longer
2522          * be able to find the station this way, and we don't rely
2523          * on further RCU synchronisation after the sta_state()
2524          * callback deleted the station.
2525          */
2526         mutex_lock(&mvm->mutex);
2527         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2528                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2529                                    ERR_PTR(-ENOENT));
2530         mutex_unlock(&mvm->mutex);
2531 }
2532
2533 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2534                                 const u8 *bssid)
2535 {
2536         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2537                 return;
2538
2539         if (iwlwifi_mod_params.uapsd_disable) {
2540                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2541                 return;
2542         }
2543
2544         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2545 }
2546
2547 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2548                                  struct ieee80211_vif *vif,
2549                                  struct ieee80211_sta *sta,
2550                                  enum ieee80211_sta_state old_state,
2551                                  enum ieee80211_sta_state new_state)
2552 {
2553         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2554         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2555         int ret;
2556
2557         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2558                            sta->addr, old_state, new_state);
2559
2560         /* this would be a mac80211 bug ... but don't crash */
2561         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2562                 return -EINVAL;
2563
2564         /* if a STA is being removed, reuse its ID */
2565         flush_work(&mvm->sta_drained_wk);
2566
2567         mutex_lock(&mvm->mutex);
2568         if (old_state == IEEE80211_STA_NOTEXIST &&
2569             new_state == IEEE80211_STA_NONE) {
2570                 /*
2571                  * Firmware bug - it'll crash if the beacon interval is less
2572                  * than 16. We can't avoid connecting at all, so refuse the
2573                  * station state change, this will cause mac80211 to abandon
2574                  * attempts to connect to this AP, and eventually wpa_s will
2575                  * blacklist the AP...
2576                  */
2577                 if (vif->type == NL80211_IFTYPE_STATION &&
2578                     vif->bss_conf.beacon_int < 16) {
2579                         IWL_ERR(mvm,
2580                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2581                                 sta->addr, vif->bss_conf.beacon_int);
2582                         ret = -EINVAL;
2583                         goto out_unlock;
2584                 }
2585
2586                 if (sta->tdls &&
2587                     (vif->p2p ||
2588                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2589                                                 IWL_MVM_TDLS_STA_COUNT ||
2590                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2591                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2592                         ret = -EBUSY;
2593                         goto out_unlock;
2594                 }
2595
2596                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2597                 if (sta->tdls && ret == 0)
2598                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2599         } else if (old_state == IEEE80211_STA_NONE &&
2600                    new_state == IEEE80211_STA_AUTH) {
2601                 /*
2602                  * EBS may be disabled due to previous failures reported by FW.
2603                  * Reset EBS status here assuming environment has been changed.
2604                  */
2605                 mvm->last_ebs_successful = true;
2606                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2607                 ret = 0;
2608         } else if (old_state == IEEE80211_STA_AUTH &&
2609                    new_state == IEEE80211_STA_ASSOC) {
2610                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2611                 if (ret == 0)
2612                         iwl_mvm_rs_rate_init(mvm, sta,
2613                                              mvmvif->phy_ctxt->channel->band,
2614                                              true);
2615         } else if (old_state == IEEE80211_STA_ASSOC &&
2616                    new_state == IEEE80211_STA_AUTHORIZED) {
2617
2618                 /* we don't support TDLS during DCM */
2619                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2620                         iwl_mvm_teardown_tdls_peers(mvm);
2621
2622                 /* enable beacon filtering */
2623                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2624                 ret = 0;
2625         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2626                    new_state == IEEE80211_STA_ASSOC) {
2627                 /* disable beacon filtering */
2628                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2629                 ret = 0;
2630         } else if (old_state == IEEE80211_STA_ASSOC &&
2631                    new_state == IEEE80211_STA_AUTH) {
2632                 ret = 0;
2633         } else if (old_state == IEEE80211_STA_AUTH &&
2634                    new_state == IEEE80211_STA_NONE) {
2635                 ret = 0;
2636         } else if (old_state == IEEE80211_STA_NONE &&
2637                    new_state == IEEE80211_STA_NOTEXIST) {
2638                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2639                 if (sta->tdls)
2640                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2641         } else {
2642                 ret = -EIO;
2643         }
2644  out_unlock:
2645         mutex_unlock(&mvm->mutex);
2646
2647         if (sta->tdls && ret == 0) {
2648                 if (old_state == IEEE80211_STA_NOTEXIST &&
2649                     new_state == IEEE80211_STA_NONE)
2650                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2651                 else if (old_state == IEEE80211_STA_NONE &&
2652                          new_state == IEEE80211_STA_NOTEXIST)
2653                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2654         }
2655
2656         return ret;
2657 }
2658
2659 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2660 {
2661         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2662
2663         mvm->rts_threshold = value;
2664
2665         return 0;
2666 }
2667
2668 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2669                                   struct ieee80211_vif *vif,
2670                                   struct ieee80211_sta *sta, u32 changed)
2671 {
2672         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2673
2674         if (vif->type == NL80211_IFTYPE_STATION &&
2675             changed & IEEE80211_RC_NSS_CHANGED)
2676                 iwl_mvm_sf_update(mvm, vif, false);
2677 }
2678
2679 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2680                                struct ieee80211_vif *vif, u16 ac,
2681                                const struct ieee80211_tx_queue_params *params)
2682 {
2683         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2684         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2685
2686         mvmvif->queue_params[ac] = *params;
2687
2688         /*
2689          * No need to update right away, we'll get BSS_CHANGED_QOS
2690          * The exception is P2P_DEVICE interface which needs immediate update.
2691          */
2692         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2693                 int ret;
2694
2695                 mutex_lock(&mvm->mutex);
2696                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2697                 mutex_unlock(&mvm->mutex);
2698                 return ret;
2699         }
2700         return 0;
2701 }
2702
2703 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2704                                       struct ieee80211_vif *vif)
2705 {
2706         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2707         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2708                            200 + vif->bss_conf.beacon_int);
2709         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2710                                100 + vif->bss_conf.beacon_int);
2711
2712         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2713                 return;
2714
2715         /*
2716          * iwl_mvm_protect_session() reads directly from the device
2717          * (the system time), so make sure it is available.
2718          */
2719         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2720                 return;
2721
2722         mutex_lock(&mvm->mutex);
2723         /* Try really hard to protect the session and hear a beacon */
2724         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2725         mutex_unlock(&mvm->mutex);
2726
2727         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2728 }
2729
2730 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2731                                         struct ieee80211_vif *vif,
2732                                         struct cfg80211_sched_scan_request *req,
2733                                         struct ieee80211_scan_ies *ies)
2734 {
2735         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2736
2737         int ret;
2738
2739         mutex_lock(&mvm->mutex);
2740
2741         if (!vif->bss_conf.idle) {
2742                 ret = -EBUSY;
2743                 goto out;
2744         }
2745
2746         ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2747
2748 out:
2749         mutex_unlock(&mvm->mutex);
2750         return ret;
2751 }
2752
2753 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2754                                        struct ieee80211_vif *vif)
2755 {
2756         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2757         int ret;
2758
2759         mutex_lock(&mvm->mutex);
2760
2761         /* Due to a race condition, it's possible that mac80211 asks
2762          * us to stop a sched_scan when it's already stopped.  This
2763          * can happen, for instance, if we stopped the scan ourselves,
2764          * called ieee80211_sched_scan_stopped() and the userspace called
2765          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2766          * could run.  To handle this, simply return if the scan is
2767          * not running.
2768         */
2769         /* FIXME: for now, we ignore this race for UMAC scans, since
2770          * they don't set the scan_status.
2771          */
2772         if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED) &&
2773             !(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2774                 mutex_unlock(&mvm->mutex);
2775                 return 0;
2776         }
2777
2778         ret = iwl_mvm_scan_offload_stop(mvm, false);
2779         mutex_unlock(&mvm->mutex);
2780         iwl_mvm_wait_for_async_handlers(mvm);
2781
2782         return ret;
2783 }
2784
2785 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2786                                enum set_key_cmd cmd,
2787                                struct ieee80211_vif *vif,
2788                                struct ieee80211_sta *sta,
2789                                struct ieee80211_key_conf *key)
2790 {
2791         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2792         int ret;
2793
2794         if (iwlwifi_mod_params.sw_crypto) {
2795                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2796                 return -EOPNOTSUPP;
2797         }
2798
2799         switch (key->cipher) {
2800         case WLAN_CIPHER_SUITE_TKIP:
2801                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2802                 /* fall-through */
2803         case WLAN_CIPHER_SUITE_CCMP:
2804                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2805                 break;
2806         case WLAN_CIPHER_SUITE_AES_CMAC:
2807                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2808                 break;
2809         case WLAN_CIPHER_SUITE_WEP40:
2810         case WLAN_CIPHER_SUITE_WEP104:
2811                 /* For non-client mode, only use WEP keys for TX as we probably
2812                  * don't have a station yet anyway and would then have to keep
2813                  * track of the keys, linking them to each of the clients/peers
2814                  * as they appear. For now, don't do that, for performance WEP
2815                  * offload doesn't really matter much, but we need it for some
2816                  * other offload features in client mode.
2817                  */
2818                 if (vif->type != NL80211_IFTYPE_STATION)
2819                         return 0;
2820                 break;
2821         default:
2822                 /* currently FW supports only one optional cipher scheme */
2823                 if (hw->n_cipher_schemes &&
2824                     hw->cipher_schemes->cipher == key->cipher)
2825                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2826                 else
2827                         return -EOPNOTSUPP;
2828         }
2829
2830         mutex_lock(&mvm->mutex);
2831
2832         switch (cmd) {
2833         case SET_KEY:
2834                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2835                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2836                         /*
2837                          * GTK on AP interface is a TX-only key, return 0;
2838                          * on IBSS they're per-station and because we're lazy
2839                          * we don't support them for RX, so do the same.
2840                          */
2841                         ret = 0;
2842                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2843                         break;
2844                 }
2845
2846                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2847                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2848                 if (ret) {
2849                         IWL_WARN(mvm, "set key failed\n");
2850                         /*
2851                          * can't add key for RX, but we don't need it
2852                          * in the device for TX so still return 0
2853                          */
2854                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2855                         ret = 0;
2856                 }
2857
2858                 break;
2859         case DISABLE_KEY:
2860                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2861                         ret = 0;
2862                         break;
2863                 }
2864
2865                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2866                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2867                 break;
2868         default:
2869                 ret = -EINVAL;
2870         }
2871
2872         mutex_unlock(&mvm->mutex);
2873         return ret;
2874 }
2875
2876 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2877                                         struct ieee80211_vif *vif,
2878                                         struct ieee80211_key_conf *keyconf,
2879                                         struct ieee80211_sta *sta,
2880                                         u32 iv32, u16 *phase1key)
2881 {
2882         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2883
2884         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2885                 return;
2886
2887         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2888 }
2889
2890
2891 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2892                                struct iwl_rx_packet *pkt, void *data)
2893 {
2894         struct iwl_mvm *mvm =
2895                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2896         struct iwl_hs20_roc_res *resp;
2897         int resp_len = iwl_rx_packet_payload_len(pkt);
2898         struct iwl_mvm_time_event_data *te_data = data;
2899
2900         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2901                 return true;
2902
2903         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2904                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2905                 return true;
2906         }
2907
2908         resp = (void *)pkt->data;
2909
2910         IWL_DEBUG_TE(mvm,
2911                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2912                      resp->status, resp->event_unique_id);
2913
2914         te_data->uid = le32_to_cpu(resp->event_unique_id);
2915         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2916                      te_data->uid);
2917
2918         spin_lock_bh(&mvm->time_event_lock);
2919         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2920         spin_unlock_bh(&mvm->time_event_lock);
2921
2922         return true;
2923 }
2924
2925 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 200
2926 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2927                                     struct ieee80211_channel *channel,
2928                                     struct ieee80211_vif *vif,
2929                                     int duration)
2930 {
2931         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2932         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2933         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2934         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2935         struct iwl_notification_wait wait_time_event;
2936         struct iwl_hs20_roc_req aux_roc_req = {
2937                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2938                 .id_and_color =
2939                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2940                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2941                 /* Set the channel info data */
2942                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2943                         PHY_BAND_24 : PHY_BAND_5,
2944                 .channel_info.channel = channel->hw_value,
2945                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2946                 /* Set the time and duration */
2947                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2948                 .apply_time_max_delay =
2949                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2950                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2951          };
2952
2953         /* Set the node address */
2954         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2955
2956         lockdep_assert_held(&mvm->mutex);
2957
2958         spin_lock_bh(&mvm->time_event_lock);
2959
2960         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2961                 spin_unlock_bh(&mvm->time_event_lock);
2962                 return -EIO;
2963         }
2964
2965         te_data->vif = vif;
2966         te_data->duration = duration;
2967         te_data->id = HOT_SPOT_CMD;
2968
2969         spin_unlock_bh(&mvm->time_event_lock);
2970
2971         /*
2972          * Use a notification wait, which really just processes the
2973          * command response and doesn't wait for anything, in order
2974          * to be able to process the response and get the UID inside
2975          * the RX path. Using CMD_WANT_SKB doesn't work because it
2976          * stores the buffer and then wakes up this thread, by which
2977          * time another notification (that the time event started)
2978          * might already be processed unsuccessfully.
2979          */
2980         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2981                                    time_event_response,
2982                                    ARRAY_SIZE(time_event_response),
2983                                    iwl_mvm_rx_aux_roc, te_data);
2984
2985         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2986                                    &aux_roc_req);
2987
2988         if (res) {
2989                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2990                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2991                 goto out_clear_te;
2992         }
2993
2994         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2995         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2996         /* should never fail */
2997         WARN_ON_ONCE(res);
2998
2999         if (res) {
3000  out_clear_te:
3001                 spin_lock_bh(&mvm->time_event_lock);
3002                 iwl_mvm_te_clear_data(mvm, te_data);
3003                 spin_unlock_bh(&mvm->time_event_lock);
3004         }
3005
3006         return res;
3007 }
3008
3009 static int iwl_mvm_roc(struct ieee80211_hw *hw,
3010                        struct ieee80211_vif *vif,
3011                        struct ieee80211_channel *channel,
3012                        int duration,
3013                        enum ieee80211_roc_type type)
3014 {
3015         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3016         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3017         struct cfg80211_chan_def chandef;
3018         struct iwl_mvm_phy_ctxt *phy_ctxt;
3019         int ret, i;
3020
3021         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
3022                            duration, type);
3023
3024         flush_work(&mvm->roc_done_wk);
3025
3026         mutex_lock(&mvm->mutex);
3027
3028         switch (vif->type) {
3029         case NL80211_IFTYPE_STATION:
3030                 if (mvm->fw->ucode_capa.capa[0] &
3031                     IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT) {
3032                         /* Use aux roc framework (HS20) */
3033                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
3034                                                        vif, duration);
3035                         goto out_unlock;
3036                 }
3037                 IWL_ERR(mvm, "hotspot not supported\n");
3038                 ret = -EINVAL;
3039                 goto out_unlock;
3040         case NL80211_IFTYPE_P2P_DEVICE:
3041                 /* handle below */
3042                 break;
3043         default:
3044                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
3045                 ret = -EINVAL;
3046                 goto out_unlock;
3047         }
3048
3049         for (i = 0; i < NUM_PHY_CTX; i++) {
3050                 phy_ctxt = &mvm->phy_ctxts[i];
3051                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3052                         continue;
3053
3054                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3055                         /*
3056                          * Unbind the P2P_DEVICE from the current PHY context,
3057                          * and if the PHY context is not used remove it.
3058                          */
3059                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
3060                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3061                                 goto out_unlock;
3062
3063                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3064
3065                         /* Bind the P2P_DEVICE to the current PHY Context */
3066                         mvmvif->phy_ctxt = phy_ctxt;
3067
3068                         ret = iwl_mvm_binding_add_vif(mvm, vif);
3069                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3070                                 goto out_unlock;
3071
3072                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3073                         goto schedule_time_event;
3074                 }
3075         }
3076
3077         /* Need to update the PHY context only if the ROC channel changed */
3078         if (channel == mvmvif->phy_ctxt->channel)
3079                 goto schedule_time_event;
3080
3081         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3082
3083         /*
3084          * Change the PHY context configuration as it is currently referenced
3085          * only by the P2P Device MAC
3086          */
3087         if (mvmvif->phy_ctxt->ref == 1) {
3088                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3089                                                &chandef, 1, 1);
3090                 if (ret)
3091                         goto out_unlock;
3092         } else {
3093                 /*
3094                  * The PHY context is shared with other MACs. Need to remove the
3095                  * P2P Device from the binding, allocate an new PHY context and
3096                  * create a new binding
3097                  */
3098                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3099                 if (!phy_ctxt) {
3100                         ret = -ENOSPC;
3101                         goto out_unlock;
3102                 }
3103
3104                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3105                                                1, 1);
3106                 if (ret) {
3107                         IWL_ERR(mvm, "Failed to change PHY context\n");
3108                         goto out_unlock;
3109                 }
3110
3111                 /* Unbind the P2P_DEVICE from the current PHY context */
3112                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
3113                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3114                         goto out_unlock;
3115
3116                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3117
3118                 /* Bind the P2P_DEVICE to the new allocated PHY context */
3119                 mvmvif->phy_ctxt = phy_ctxt;
3120
3121                 ret = iwl_mvm_binding_add_vif(mvm, vif);
3122                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3123                         goto out_unlock;
3124
3125                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3126         }
3127
3128 schedule_time_event:
3129         /* Schedule the time events */
3130         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3131
3132 out_unlock:
3133         mutex_unlock(&mvm->mutex);
3134         IWL_DEBUG_MAC80211(mvm, "leave\n");
3135         return ret;
3136 }
3137
3138 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3139 {
3140         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3141
3142         IWL_DEBUG_MAC80211(mvm, "enter\n");
3143
3144         mutex_lock(&mvm->mutex);
3145         iwl_mvm_stop_roc(mvm);
3146         mutex_unlock(&mvm->mutex);
3147
3148         IWL_DEBUG_MAC80211(mvm, "leave\n");
3149         return 0;
3150 }
3151
3152 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3153                                  struct ieee80211_chanctx_conf *ctx)
3154 {
3155         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3156         struct iwl_mvm_phy_ctxt *phy_ctxt;
3157         int ret;
3158
3159         lockdep_assert_held(&mvm->mutex);
3160
3161         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3162
3163         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3164         if (!phy_ctxt) {
3165                 ret = -ENOSPC;
3166                 goto out;
3167         }
3168
3169         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3170                                        ctx->rx_chains_static,
3171                                        ctx->rx_chains_dynamic);
3172         if (ret) {
3173                 IWL_ERR(mvm, "Failed to add PHY context\n");
3174                 goto out;
3175         }
3176
3177         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3178         *phy_ctxt_id = phy_ctxt->id;
3179 out:
3180         return ret;
3181 }
3182
3183 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3184                                struct ieee80211_chanctx_conf *ctx)
3185 {
3186         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3187         int ret;
3188
3189         mutex_lock(&mvm->mutex);
3190         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3191         mutex_unlock(&mvm->mutex);
3192
3193         return ret;
3194 }
3195
3196 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3197                                      struct ieee80211_chanctx_conf *ctx)
3198 {
3199         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3200         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3201
3202         lockdep_assert_held(&mvm->mutex);
3203
3204         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3205 }
3206
3207 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3208                                    struct ieee80211_chanctx_conf *ctx)
3209 {
3210         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3211
3212         mutex_lock(&mvm->mutex);
3213         __iwl_mvm_remove_chanctx(mvm, ctx);
3214         mutex_unlock(&mvm->mutex);
3215 }
3216
3217 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3218                                    struct ieee80211_chanctx_conf *ctx,
3219                                    u32 changed)
3220 {
3221         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3222         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3223         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3224
3225         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3226                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3227                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3228                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3229                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3230                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3231                       phy_ctxt->ref, changed))
3232                 return;
3233
3234         mutex_lock(&mvm->mutex);
3235         iwl_mvm_bt_coex_vif_change(mvm);
3236         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3237                                  ctx->rx_chains_static,
3238                                  ctx->rx_chains_dynamic);
3239         mutex_unlock(&mvm->mutex);
3240 }
3241
3242 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3243                                         struct ieee80211_vif *vif,
3244                                         struct ieee80211_chanctx_conf *ctx,
3245                                         bool switching_chanctx)
3246 {
3247         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3248         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3249         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3250         int ret;
3251
3252         lockdep_assert_held(&mvm->mutex);
3253
3254         mvmvif->phy_ctxt = phy_ctxt;
3255
3256         switch (vif->type) {
3257         case NL80211_IFTYPE_AP:
3258                 /* only needed if we're switching chanctx (i.e. during CSA) */
3259                 if (switching_chanctx) {
3260                         mvmvif->ap_ibss_active = true;
3261                         break;
3262                 }
3263         case NL80211_IFTYPE_ADHOC:
3264                 /*
3265                  * The AP binding flow is handled as part of the start_ap flow
3266                  * (in bss_info_changed), similarly for IBSS.
3267                  */
3268                 ret = 0;
3269                 goto out;
3270         case NL80211_IFTYPE_STATION:
3271                 break;
3272         case NL80211_IFTYPE_MONITOR:
3273                 /* always disable PS when a monitor interface is active */
3274                 mvmvif->ps_disabled = true;
3275                 break;
3276         default:
3277                 ret = -EINVAL;
3278                 goto out;
3279         }
3280
3281         ret = iwl_mvm_binding_add_vif(mvm, vif);
3282         if (ret)
3283                 goto out;
3284
3285         /*
3286          * Power state must be updated before quotas,
3287          * otherwise fw will complain.
3288          */
3289         iwl_mvm_power_update_mac(mvm);
3290
3291         /* Setting the quota at this stage is only required for monitor
3292          * interfaces. For the other types, the bss_info changed flow
3293          * will handle quota settings.
3294          */
3295         if (vif->type == NL80211_IFTYPE_MONITOR) {
3296                 mvmvif->monitor_active = true;
3297                 ret = iwl_mvm_update_quotas(mvm, false, NULL);
3298                 if (ret)
3299                         goto out_remove_binding;
3300         }
3301
3302         /* Handle binding during CSA */
3303         if (vif->type == NL80211_IFTYPE_AP) {
3304                 iwl_mvm_update_quotas(mvm, false, NULL);
3305                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3306         }
3307
3308         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3309                 u32 duration = 2 * vif->bss_conf.beacon_int;
3310
3311                 /* iwl_mvm_protect_session() reads directly from the
3312                  * device (the system time), so make sure it is
3313                  * available.
3314                  */
3315                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3316                 if (ret)
3317                         goto out_remove_binding;
3318
3319                 /* Protect the session to make sure we hear the first
3320                  * beacon on the new channel.
3321                  */
3322                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3323                                         vif->bss_conf.beacon_int / 2,
3324                                         true);
3325
3326                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3327
3328                 iwl_mvm_update_quotas(mvm, false, NULL);
3329         }
3330
3331         goto out;
3332
3333 out_remove_binding:
3334         iwl_mvm_binding_remove_vif(mvm, vif);
3335         iwl_mvm_power_update_mac(mvm);
3336 out:
3337         if (ret)
3338                 mvmvif->phy_ctxt = NULL;
3339         return ret;
3340 }
3341 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3342                                       struct ieee80211_vif *vif,
3343                                       struct ieee80211_chanctx_conf *ctx)
3344 {
3345         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3346         int ret;
3347
3348         mutex_lock(&mvm->mutex);
3349         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3350         mutex_unlock(&mvm->mutex);
3351
3352         return ret;
3353 }
3354
3355 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3356                                            struct ieee80211_vif *vif,
3357                                            struct ieee80211_chanctx_conf *ctx,
3358                                            bool switching_chanctx)
3359 {
3360         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3361         struct ieee80211_vif *disabled_vif = NULL;
3362
3363         lockdep_assert_held(&mvm->mutex);
3364
3365         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3366
3367         switch (vif->type) {
3368         case NL80211_IFTYPE_ADHOC:
3369                 goto out;
3370         case NL80211_IFTYPE_MONITOR:
3371                 mvmvif->monitor_active = false;
3372                 mvmvif->ps_disabled = false;
3373                 break;
3374         case NL80211_IFTYPE_AP:
3375                 /* This part is triggered only during CSA */
3376                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3377                         goto out;
3378
3379                 mvmvif->csa_countdown = false;
3380
3381                 /* Set CS bit on all the stations */
3382                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3383
3384                 /* Save blocked iface, the timeout is set on the next beacon */
3385                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3386
3387                 mvmvif->ap_ibss_active = false;
3388                 break;
3389         case NL80211_IFTYPE_STATION:
3390                 if (!switching_chanctx)
3391                         break;
3392
3393                 disabled_vif = vif;
3394
3395                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3396                 break;
3397         default:
3398                 break;
3399         }
3400
3401         iwl_mvm_update_quotas(mvm, false, disabled_vif);
3402         iwl_mvm_binding_remove_vif(mvm, vif);
3403
3404 out:
3405         mvmvif->phy_ctxt = NULL;
3406         iwl_mvm_power_update_mac(mvm);
3407 }
3408
3409 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3410                                          struct ieee80211_vif *vif,
3411                                          struct ieee80211_chanctx_conf *ctx)
3412 {
3413         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3414
3415         mutex_lock(&mvm->mutex);
3416         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3417         mutex_unlock(&mvm->mutex);
3418 }
3419
3420 static int
3421 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3422                                 struct ieee80211_vif_chanctx_switch *vifs)
3423 {
3424         int ret;
3425
3426         mutex_lock(&mvm->mutex);
3427         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3428         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3429
3430         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3431         if (ret) {
3432                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3433                 goto out_reassign;
3434         }
3435
3436         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3437                                            true);
3438         if (ret) {
3439                 IWL_ERR(mvm,
3440                         "failed to assign new_ctx during channel switch\n");
3441                 goto out_remove;
3442         }
3443
3444         /* we don't support TDLS during DCM - can be caused by channel switch */
3445         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3446                 iwl_mvm_teardown_tdls_peers(mvm);
3447
3448         goto out;
3449
3450 out_remove:
3451         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3452
3453 out_reassign:
3454         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3455                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3456                 goto out_restart;
3457         }
3458
3459         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3460                                          true)) {
3461                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3462                 goto out_restart;
3463         }
3464
3465         goto out;
3466
3467 out_restart:
3468         /* things keep failing, better restart the hw */
3469         iwl_mvm_nic_restart(mvm, false);
3470
3471 out:
3472         mutex_unlock(&mvm->mutex);
3473
3474         return ret;
3475 }
3476
3477 static int
3478 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3479                                     struct ieee80211_vif_chanctx_switch *vifs)
3480 {
3481         int ret;
3482
3483         mutex_lock(&mvm->mutex);
3484         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3485
3486         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3487                                            true);
3488         if (ret) {
3489                 IWL_ERR(mvm,
3490                         "failed to assign new_ctx during channel switch\n");
3491                 goto out_reassign;
3492         }
3493
3494         goto out;
3495
3496 out_reassign:
3497         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3498                                          true)) {
3499                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3500                 goto out_restart;
3501         }
3502
3503         goto out;
3504
3505 out_restart:
3506         /* things keep failing, better restart the hw */
3507         iwl_mvm_nic_restart(mvm, false);
3508
3509 out:
3510         mutex_unlock(&mvm->mutex);
3511
3512         return ret;
3513 }
3514
3515 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3516                                       struct ieee80211_vif_chanctx_switch *vifs,
3517                                       int n_vifs,
3518                                       enum ieee80211_chanctx_switch_mode mode)
3519 {
3520         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3521         int ret;
3522
3523         /* we only support a single-vif right now */
3524         if (n_vifs > 1)
3525                 return -EOPNOTSUPP;
3526
3527         switch (mode) {
3528         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3529                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3530                 break;
3531         case CHANCTX_SWMODE_REASSIGN_VIF:
3532                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3533                 break;
3534         default:
3535                 ret = -EOPNOTSUPP;
3536                 break;
3537         }
3538
3539         return ret;
3540 }
3541
3542 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3543                            struct ieee80211_sta *sta,
3544                            bool set)
3545 {
3546         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3547         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3548
3549         if (!mvm_sta || !mvm_sta->vif) {
3550                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3551                 return -EINVAL;
3552         }
3553
3554         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3555 }
3556
3557 #ifdef CONFIG_NL80211_TESTMODE
3558 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3559         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3560         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3561         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3562 };
3563
3564 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3565                                       struct ieee80211_vif *vif,
3566                                       void *data, int len)
3567 {
3568         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3569         int err;
3570         u32 noa_duration;
3571
3572         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3573         if (err)
3574                 return err;
3575
3576         if (!tb[IWL_MVM_TM_ATTR_CMD])
3577                 return -EINVAL;
3578
3579         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3580         case IWL_MVM_TM_CMD_SET_NOA:
3581                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3582                     !vif->bss_conf.enable_beacon ||
3583                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3584                         return -EINVAL;
3585
3586                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3587                 if (noa_duration >= vif->bss_conf.beacon_int)
3588                         return -EINVAL;
3589
3590                 mvm->noa_duration = noa_duration;
3591                 mvm->noa_vif = vif;
3592
3593                 return iwl_mvm_update_quotas(mvm, false, NULL);
3594         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3595                 /* must be associated client vif - ignore authorized */
3596                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3597                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3598                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3599                         return -EINVAL;
3600
3601                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3602                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3603                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3604         }
3605
3606         return -EOPNOTSUPP;
3607 }
3608
3609 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3610                                     struct ieee80211_vif *vif,
3611                                     void *data, int len)
3612 {
3613         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3614         int err;
3615
3616         mutex_lock(&mvm->mutex);
3617         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3618         mutex_unlock(&mvm->mutex);
3619
3620         return err;
3621 }
3622 #endif
3623
3624 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3625                                    struct ieee80211_vif *vif,
3626                                    struct ieee80211_channel_switch *chsw)
3627 {
3628         /* By implementing this operation, we prevent mac80211 from
3629          * starting its own channel switch timer, so that we can call
3630          * ieee80211_chswitch_done() ourselves at the right time
3631          * (which is when the absence time event starts).
3632          */
3633
3634         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3635                            "dummy channel switch op\n");
3636 }
3637
3638 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3639                                       struct ieee80211_vif *vif,
3640                                       struct ieee80211_channel_switch *chsw)
3641 {
3642         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3643         struct ieee80211_vif *csa_vif;
3644         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3645         u32 apply_time;
3646         int ret;
3647
3648         mutex_lock(&mvm->mutex);
3649
3650         mvmvif->csa_failed = false;
3651
3652         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3653                            chsw->chandef.center_freq1);
3654
3655         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3656
3657         switch (vif->type) {
3658         case NL80211_IFTYPE_AP:
3659                 csa_vif =
3660                         rcu_dereference_protected(mvm->csa_vif,
3661                                                   lockdep_is_held(&mvm->mutex));
3662                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3663                               "Another CSA is already in progress")) {
3664                         ret = -EBUSY;
3665                         goto out_unlock;
3666                 }
3667
3668                 rcu_assign_pointer(mvm->csa_vif, vif);
3669
3670                 if (WARN_ONCE(mvmvif->csa_countdown,
3671                               "Previous CSA countdown didn't complete")) {
3672                         ret = -EBUSY;
3673                         goto out_unlock;
3674                 }
3675
3676                 break;
3677         case NL80211_IFTYPE_STATION:
3678                 /* Schedule the time event to a bit before beacon 1,
3679                  * to make sure we're in the new channel when the
3680                  * GO/AP arrives.
3681                  */
3682                 apply_time = chsw->device_timestamp +
3683                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3684                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3685
3686                 if (chsw->block_tx)
3687                         iwl_mvm_csa_client_absent(mvm, vif);
3688
3689                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3690                                             apply_time);
3691                 if (mvmvif->bf_data.bf_enabled) {
3692                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3693                         if (ret)
3694                                 goto out_unlock;
3695                 }
3696
3697                 break;
3698         default:
3699                 break;
3700         }
3701
3702         mvmvif->ps_disabled = true;
3703
3704         ret = iwl_mvm_power_update_ps(mvm);
3705         if (ret)
3706                 goto out_unlock;
3707
3708         /* we won't be on this channel any longer */
3709         iwl_mvm_teardown_tdls_peers(mvm);
3710
3711 out_unlock:
3712         mutex_unlock(&mvm->mutex);
3713
3714         return ret;
3715 }
3716
3717 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3718                                        struct ieee80211_vif *vif)
3719 {
3720         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3721         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3722         int ret;
3723
3724         mutex_lock(&mvm->mutex);
3725
3726         if (mvmvif->csa_failed) {
3727                 mvmvif->csa_failed = false;
3728                 ret = -EIO;
3729                 goto out_unlock;
3730         }
3731
3732         if (vif->type == NL80211_IFTYPE_STATION) {
3733                 struct iwl_mvm_sta *mvmsta;
3734
3735                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3736                                                           mvmvif->ap_sta_id);
3737
3738                 if (WARN_ON(!mvmsta)) {
3739                         ret = -EIO;
3740                         goto out_unlock;
3741                 }
3742
3743                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3744
3745                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3746
3747                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3748                 if (ret)
3749                         goto out_unlock;
3750
3751                 iwl_mvm_stop_session_protection(mvm, vif);
3752         }
3753
3754         mvmvif->ps_disabled = false;
3755
3756         ret = iwl_mvm_power_update_ps(mvm);
3757
3758 out_unlock:
3759         mutex_unlock(&mvm->mutex);
3760
3761         return ret;
3762 }
3763
3764 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3765                               struct ieee80211_vif *vif, u32 queues, bool drop)
3766 {
3767         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3768         struct iwl_mvm_vif *mvmvif;
3769         struct iwl_mvm_sta *mvmsta;
3770         struct ieee80211_sta *sta;
3771         int i;
3772         u32 msk = 0;
3773
3774         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3775                 return;
3776
3777         mutex_lock(&mvm->mutex);
3778         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3779
3780         /* flush the AP-station and all TDLS peers */
3781         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3782                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3783                                                 lockdep_is_held(&mvm->mutex));
3784                 if (IS_ERR_OR_NULL(sta))
3785                         continue;
3786
3787                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3788                 if (mvmsta->vif != vif)
3789                         continue;
3790
3791                 /* make sure only TDLS peers or the AP are flushed */
3792                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3793
3794                 msk |= mvmsta->tfd_queue_msk;
3795         }
3796
3797         if (drop) {
3798                 if (iwl_mvm_flush_tx_path(mvm, msk, true))
3799                         IWL_ERR(mvm, "flush request fail\n");
3800                 mutex_unlock(&mvm->mutex);
3801         } else {
3802                 mutex_unlock(&mvm->mutex);
3803
3804                 /* this can take a while, and we may need/want other operations
3805                  * to succeed while doing this, so do it without the mutex held
3806                  */
3807                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3808         }
3809 }
3810
3811 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3812                                   struct survey_info *survey)
3813 {
3814         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3815         int ret;
3816
3817         memset(survey, 0, sizeof(*survey));
3818
3819         /* only support global statistics right now */
3820         if (idx != 0)
3821                 return -ENOENT;
3822
3823         if (!(mvm->fw->ucode_capa.capa[0] &
3824                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3825                 return -ENOENT;
3826
3827         mutex_lock(&mvm->mutex);
3828
3829         if (mvm->ucode_loaded) {
3830                 ret = iwl_mvm_request_statistics(mvm, false);
3831                 if (ret)
3832                         goto out;
3833         }
3834
3835         survey->filled = SURVEY_INFO_TIME |
3836                          SURVEY_INFO_TIME_RX |
3837                          SURVEY_INFO_TIME_TX |
3838                          SURVEY_INFO_TIME_SCAN;
3839         survey->time = mvm->accu_radio_stats.on_time_rf +
3840                        mvm->radio_stats.on_time_rf;
3841         do_div(survey->time, USEC_PER_MSEC);
3842
3843         survey->time_rx = mvm->accu_radio_stats.rx_time +
3844                           mvm->radio_stats.rx_time;
3845         do_div(survey->time_rx, USEC_PER_MSEC);
3846
3847         survey->time_tx = mvm->accu_radio_stats.tx_time +
3848                           mvm->radio_stats.tx_time;
3849         do_div(survey->time_tx, USEC_PER_MSEC);
3850
3851         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
3852                             mvm->radio_stats.on_time_scan;
3853         do_div(survey->time_scan, USEC_PER_MSEC);
3854
3855         ret = 0;
3856  out:
3857         mutex_unlock(&mvm->mutex);
3858         return ret;
3859 }
3860
3861 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
3862                                        struct ieee80211_vif *vif,
3863                                        struct ieee80211_sta *sta,
3864                                        struct station_info *sinfo)
3865 {
3866         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3867         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3868         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3869
3870         if (!(mvm->fw->ucode_capa.capa[0] &
3871                                 IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3872                 return;
3873
3874         /* if beacon filtering isn't on mac80211 does it anyway */
3875         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
3876                 return;
3877
3878         if (!vif->bss_conf.assoc)
3879                 return;
3880
3881         mutex_lock(&mvm->mutex);
3882
3883         if (mvmvif->ap_sta_id != mvmsta->sta_id)
3884                 goto unlock;
3885
3886         if (iwl_mvm_request_statistics(mvm, false))
3887                 goto unlock;
3888
3889         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
3890                            mvmvif->beacon_stats.accu_num_beacons;
3891         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
3892         if (mvmvif->beacon_stats.avg_signal) {
3893                 /* firmware only reports a value after RXing a few beacons */
3894                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
3895                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
3896         }
3897  unlock:
3898         mutex_unlock(&mvm->mutex);
3899 }
3900
3901 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
3902                                        struct ieee80211_vif *vif,
3903                                        const struct ieee80211_event *event)
3904 {
3905 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)    \
3906         do {                                                    \
3907                 if ((_cnt) && --(_cnt))                         \
3908                         break;                                  \
3909                 iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
3910         } while (0)
3911
3912         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3913         struct iwl_fw_dbg_trigger_tlv *trig;
3914         struct iwl_fw_dbg_trigger_mlme *trig_mlme;
3915
3916         if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
3917                 return;
3918
3919         if (event->u.mlme.status == MLME_SUCCESS)
3920                 return;
3921
3922         trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
3923         trig_mlme = (void *)trig->data;
3924         if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
3925                 return;
3926
3927         if (event->u.mlme.data == ASSOC_EVENT) {
3928                 if (event->u.mlme.status == MLME_DENIED)
3929                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3930                                            trig_mlme->stop_assoc_denied,
3931                                            "DENIED ASSOC: reason %d",
3932                                             event->u.mlme.reason);
3933                 else if (event->u.mlme.status == MLME_TIMEOUT)
3934                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3935                                            trig_mlme->stop_assoc_timeout,
3936                                            "ASSOC TIMEOUT");
3937         } else if (event->u.mlme.data == AUTH_EVENT) {
3938                 if (event->u.mlme.status == MLME_DENIED)
3939                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3940                                            trig_mlme->stop_auth_denied,
3941                                            "DENIED AUTH: reason %d",
3942                                            event->u.mlme.reason);
3943                 else if (event->u.mlme.status == MLME_TIMEOUT)
3944                         CHECK_MLME_TRIGGER(mvm, trig, buf,
3945                                            trig_mlme->stop_auth_timeout,
3946                                            "AUTH TIMEOUT");
3947         } else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
3948                 CHECK_MLME_TRIGGER(mvm, trig, buf,
3949                                    trig_mlme->stop_rx_deauth,
3950                                    "DEAUTH RX %d", event->u.mlme.reason);
3951         } else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
3952                 CHECK_MLME_TRIGGER(mvm, trig, buf,
3953                                    trig_mlme->stop_tx_deauth,
3954                                    "DEAUTH TX %d", event->u.mlme.reason);
3955         }
3956 #undef CHECK_MLME_TRIGGER
3957 }
3958
3959 const struct ieee80211_ops iwl_mvm_hw_ops = {
3960         .tx = iwl_mvm_mac_tx,
3961         .ampdu_action = iwl_mvm_mac_ampdu_action,
3962         .start = iwl_mvm_mac_start,
3963         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
3964         .stop = iwl_mvm_mac_stop,
3965         .add_interface = iwl_mvm_mac_add_interface,
3966         .remove_interface = iwl_mvm_mac_remove_interface,
3967         .config = iwl_mvm_mac_config,
3968         .prepare_multicast = iwl_mvm_prepare_multicast,
3969         .configure_filter = iwl_mvm_configure_filter,
3970         .bss_info_changed = iwl_mvm_bss_info_changed,
3971         .hw_scan = iwl_mvm_mac_hw_scan,
3972         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3973         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3974         .sta_state = iwl_mvm_mac_sta_state,
3975         .sta_notify = iwl_mvm_mac_sta_notify,
3976         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3977         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3978         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3979         .sta_rc_update = iwl_mvm_sta_rc_update,
3980         .conf_tx = iwl_mvm_mac_conf_tx,
3981         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3982         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3983         .flush = iwl_mvm_mac_flush,
3984         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3985         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3986         .set_key = iwl_mvm_mac_set_key,
3987         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3988         .remain_on_channel = iwl_mvm_roc,
3989         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3990         .add_chanctx = iwl_mvm_add_chanctx,
3991         .remove_chanctx = iwl_mvm_remove_chanctx,
3992         .change_chanctx = iwl_mvm_change_chanctx,
3993         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3994         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3995         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3996
3997         .start_ap = iwl_mvm_start_ap_ibss,
3998         .stop_ap = iwl_mvm_stop_ap_ibss,
3999         .join_ibss = iwl_mvm_start_ap_ibss,
4000         .leave_ibss = iwl_mvm_stop_ap_ibss,
4001
4002         .set_tim = iwl_mvm_set_tim,
4003
4004         .channel_switch = iwl_mvm_channel_switch,
4005         .pre_channel_switch = iwl_mvm_pre_channel_switch,
4006         .post_channel_switch = iwl_mvm_post_channel_switch,
4007
4008         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4009         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4010         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4011
4012         .event_callback = iwl_mvm_mac_event_callback,
4013
4014         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4015
4016 #ifdef CONFIG_PM_SLEEP
4017         /* look at d3.c */
4018         .suspend = iwl_mvm_suspend,
4019         .resume = iwl_mvm_resume,
4020         .set_wakeup = iwl_mvm_set_wakeup,
4021         .set_rekey_data = iwl_mvm_set_rekey_data,
4022 #if IS_ENABLED(CONFIG_IPV6)
4023         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4024 #endif
4025         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4026 #endif
4027         .get_survey = iwl_mvm_mac_get_survey,
4028         .sta_statistics = iwl_mvm_mac_sta_statistics,
4029 };